update plato2_en_base (#2113)

* update plato2_en_base

* update README

modules/text/text_generation/plato2_en_base/README.md

-## 概述
+# plato2_en_base
 
-PLATO2是一个超大规模生成式对话系统模型。它承袭了PLATO隐变量进行回复多样化生成的特性，能够就开放域话题进行流畅深入的聊天。据公开数据，其效果超越了Google 于2020年2月份发布的 Meena和Facebook AI Research于2020年4月份发布的Blender的效果。plato2_en_base包含310M参数，可用于一键预测对话回复，该Module仅支持使用GPU预测，不支持CPU。
-<p align="center">
-<img src="https://image.jiqizhixin.com/uploads/editor/65107b78-0259-4121-b8c5-a090f9d3175b/640.png" hspace='10'/> <br />
-</p>
+| 模型名称            |       plato2_en_base       |
+| :------------------ | :--------------------: |
+| 类别                |     文本-文本生成      |
+| 网络                |  PLATO2   |
+| 数据集              | 大规模开放域英文数据集 |
+| 是否支持Fine-tuning |           否           |
+| 模型大小            |         3.5 GB      |
+| 最新更新日期        |       2022-11-05       |
+| 数据指标            |           -            |
 
-更多详情参考论文[PLATO-2: Towards Building an Open-Domain Chatbot via Curriculum Learning](https://arxiv.org/abs/2006.16779)
+## 一、模型基本信息
 
-## 命令行预测
+- ### 模型介绍
+  - PLATO2 是一个超大规模生成式对话系统模型。它承袭了 PLATO 隐变量进行回复多样化生成的特性，能够就开放域话题进行流畅深入的聊天。据公开数据，其效果超越了 Google 于 2020 年 2 月份发布的 Meena 和 Facebook AI Research 于2020 年 4 月份发布的 Blender 的效果。plato2_en_base 包含 310M 参数，可用于一键预测对话回复。由于该 Module 参数量较多，推荐使用GPU预测。
 
-```shell
-$ hub run plato2_en_base --input_text="Hello, how are you"
-```
 
-## API
+## 二、安装
 
-```python
-def generate(texts):
-```
+- ### 1、环境依赖
 
-预测API，输入对话上下文，输出机器回复。
+  - paddlepaddle >= 2.0.0
+  - paddlehub >= 2.1.0    | [如何安装PaddleHub](../../../../docs/docs_ch/get_start/installation.rst)
 
-**参数**
+- ### 2、安装
 
-* texts (list\[str\] or str): 如果不在交互模式中，texts应为list，每个元素为一次对话的上下文，上下文应包含人类和机器人的对话内容，不同角色之间的聊天用分隔符"\t"进行分割；例如[["Hello\thi, nice to meet you\tnice to meet you"]]。这个输入中包含1次对话，机器人回复了"hi, nice to meet you"后人类回复“nice to meet you”，现在轮到机器人回复了。如果在交互模式中，texts应为str，模型将自动构建它的上下文。
+  - ```shell
+    $ hub install plato2_en_base
+    ```
+  - 如您安装时遇到问题，可参考：[零基础windows安装](../../../../docs/docs_ch/get_start/windows_quickstart.md)
+ | [零基础Linux安装](../../../../docs/docs_ch/get_start/linux_quickstart.md) | [零基础MacOS安装](../../../../docs/docs_ch/get_start/mac_quickstart.md)
 
-**返回**
+## 三、模型API预测
 
-* results (list\[str\]): 每个元素为相应对话中机器人的新回复。
+- ### 1、命令行预测
 
-**代码示例**
+  - ```bash
+    $ hub run plato2_en_base --input_text="Hello, how are you"
+    ```
 
-```python
-import paddlehub as hub
+- ### 2、预测代码示例
 
-module = hub.Module(name="plato2_en_base")
+  - ```python
+    import paddlehub as hub
 
-test_texts = ["Hello","Hello\thi, nice to meet you\tnice to meet you"]
-results = module.generate(texts=test_texts)
-for result in results:
-    print(result)
-```
+    module = hub.Module(name="plato2_en_base")
 
-```python
-def interactive_mode(max_turn =6):
-```
+    test_texts = ["Hello","Hello\thi, nice to meet you\tnice to meet you"]
+    results = module.generate(texts=test_texts)
+    for result in results:
+        print(result)
+    ```
 
-进入交互模式。交互模式中，generate接口的texts将支持字符串类型。
+- ### 3、API
 
-**参数**
+  - ```python
+    def generate(texts):
+    ```
 
-* max_turn (int): 模型能记忆的对话轮次，当max_turn = 1时，模型只能记住当前对话，无法获知之前的对话内容。
+    - 预测API，输入对话上下文，输出机器回复。
+    - **参数**
+      - texts (list\[str\] or str): 如果不在交互模式中，texts应为list，每个元素为一次对话的上下文，上下文应包含人类和机器人的对话内容，不同角色之间的聊天用分隔符"\t"进行分割；例如[["Hello\thi, nice to meet you\tnice to meet you"]]。这个输入中包含1次对话，机器人回复了"hi, nice to meet you"后人类回复“nice to meet you”，现在轮到机器人回复了。如果在交互模式中，texts应为str，模型将自动构建它的上下文。
 
-**代码示例**
+  - ```python
+    def interactive_mode(max_turn=6):
+    ```
 
-```python
-import paddlehub as hub
+    - 进入交互模式。交互模式中，generate接口的texts将支持字符串类型。
+    - **参数**
+      - max_turn (int): 模型能记忆的对话轮次，当max_turn = 1时，模型只能记住当前对话，无法获知之前的对话内容。
 
-module = hub.Module(name="plato2_en_base")
 
-with module.interactive_mode(max_turn=6):
-    while True:
-        human_utterance = input("[Human]: ").strip()
-        robot_utterance = module.generate(human_utterance)
-        print("[Bot]: %s"%robot_utterance[0])
-```
+## 四、服务部署
 
-## 服务部署
+- PaddleHub Serving可以部署一个在线对话机器人服务。
 
-PaddleHub Serving 可以部署在线服务。
+- ### 第一步：启动PaddleHub Serving
 
-### 第一步：启动PaddleHub Serving
+  - 运行启动命令：
+  - ```shell
+    $ hub serving start -m plato2_en_base -p 8866
+    ```
 
-运行启动命令：
-```shell
-$ hub serving start -m plato2_en_base -p 8866
-```
+  - 这样就完成了一个对话机器人服务化API的部署，默认端口号为8866。
+  - **NOTE:** 如使用GPU预测，则需要在启动服务之前，请设置CUDA_VISIBLE_DEVICES环境变量，否则不用设置。
 
-这样就完成了一个服务化API的部署，默认端口号为8866。
 
-**NOTE:** 在启动服务之前，请设置CUDA\_VISIBLE\_DEVICES环境变量。
+- ### 第二步：发送预测请求
 
-### 第二步：发送预测请求
+  - 配置好服务端，以下数行代码即可实现发送预测请求，获取预测结果
 
-方式1： 自定义脚本发送对话信息
+  - ```python
+    import requests
+    import json
 
-配置好服务端，以下数行代码即可实现发送预测请求，获取预测结果
+    data = {'texts':["Hello","Hello\thi, nice to meet you\tnice to meet you"]}
+    headers = {"Content-type": "application/json"}
+    url = "http://127.0.0.1:8866/predict/plato2_en_base"
+    r = requests.post(url=url, headers=headers, data=json.dumps(data))
 
-```python
-import requests
-import json
+    # 保存结果
+    results = r.json()["results"]
+    for result in results:
+        print(result)
+    ```
 
-# 发送HTTP请求
+  - 关于PaddleHub Serving更多信息参考[服务部署](../../../../docs/docs_ch/tutorial/serving.md)
 
-data = {'texts':["Hello","Hello\thi, nice to meet you\tnice to meet you"]}
-headers = {"Content-type": "application/json"}
-url = "http://127.0.0.1:8866/predict/plato2_en_base"
-r = requests.post(url=url, headers=headers, data=json.dumps(data))
-
-# 保存结果
-results = r.json()["results"]
-for result in results:
-    print(result)
-```
-
-方式2： 通过交互式客户端进入交互模式
-
-您可以执行以下客户端脚本进入交互模式：
-
-```python
-import requests
-import json
-
-ADDR = "127.0.0.1" # Your serving address
-PORT = 8866 # Your serving port
-MAX_TURN = 6 # The maximum dialogue turns
-
-headers = {"Content-type": "application/json"}
-url = "http://%s:%s/predict/plato2_en_base" % (ADDR, PORT)
-
-context = []
-while True:
-    user_utt = input("[Human]: ").strip()
-    if user_utt == "[NEXT]":
-        context = ""
-        print("Restart")
-    else:
-        context.append(user_utt)
-        data = {'texts': ["\t".join(context[-MAX_TURN:])]}
-        r = requests.post(url=url, headers=headers, data=json.dumps(data))
-        bot_response = r.json()["results"][0]
-        print("[Bot]: %s"%bot_response)
-        context.append(bot_response)
-```
-
-## 查看代码
-
-https://github.com/PaddlePaddle/Knover
-
-### 依赖
-
-1.8.2 <= paddlepaddle < 2.0.0
-
-1.7.0 <= paddlehub < 2.0.0
-
-
-## 更新历史
+## 五、更新历史
 
 * 1.0.0
 
   初始发布
+  
+* 1.1.0
+
+  移除 Fluid API
+
+  - ```shell
+    $ hub install plato2_en_base==1.1.0
+    ```

modules/text/text_generation/plato2_en_base/model.py

+# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from collections import namedtuple
+
+import paddle
+import paddle.nn as nn
+import paddle.nn.functional as F
+
+
+def post_process_context(token_ids, reader, merge=True):
+    """Post-process the context sequence."""
+    context = []
+    utt = []
+    for tok_id in token_ids[1:]:
+        if tok_id == reader.eos_id:
+            utt = reader.tokenizer.convert_ids_to_tokens(utt)
+            if merge:
+                utt = reader.tokenizer.merge_subword(utt)
+            context.append(utt)
+            utt = []
+        else:
+            utt.append(tok_id)
+    return context
+
+
+def post_process_response(token_ids, reader, merge=True):
+    """
+    Post-process the decoded sequence. Truncate from the first
+    <eos> and remove the <bos> and <eos> tokens currently.
+    """
+    eos_pos = len(token_ids)
+    for i, tok_id in enumerate(token_ids):
+        if tok_id == reader.eos_id:
+            eos_pos = i
+            break
+    token_ids = token_ids[1:eos_pos]
+    response = reader.tokenizer.convert_ids_to_tokens(token_ids)
+    if merge:
+        response = reader.tokenizer.merge_subword(response)
+    return token_ids, response
+
+
+def get_cross_turn_repetition(context, pred_tokens, eos_idx, is_cn=False):
+    """Get cross-turn repetition."""
+    if len(pred_tokens) == 0:
+        return 1.0
+    if is_cn:
+        context = ["".join(utt) for utt in context]
+        pred_tokens = "".join(pred_tokens)
+
+    pred_tri_grams = set()
+    for i in range(len(pred_tokens) - 2):
+        tri_gram = tuple(pred_tokens[i:i + 3])
+        pred_tri_grams.add(tri_gram)
+    for utt in context:
+        for i in range(len(utt) - 2):
+            tri_gram = tuple(utt[i:i + 3])
+            if tri_gram in pred_tri_grams:
+                return 1.0
+    return 0.0
+
+
+def get_in_turn_repetition(pred, is_cn=False):
+    """Get in-turn repetition."""
+    if len(pred) == 0:
+        return 1.0
+    if isinstance(pred[0], str):
+        pred = [tok.lower() for tok in pred]
+        if is_cn:
+            pred = "".join(pred)
+    tri_grams = set()
+    for i in range(len(pred) - 2):
+        tri_gram = tuple(pred[i:i + 3])
+        if tri_gram in tri_grams:
+            return 1.0
+        tri_grams.add(tri_gram)
+    return 0.0
+
+
+class Plato2EncoderLayer(nn.Layer):
+
+    def __init__(self, n_head, hidden_size, attn_dropout, act_dropout):
+        super(Plato2EncoderLayer, self).__init__()
+
+        self.self_attn = nn.MultiHeadAttention(hidden_size, n_head, attn_dropout)
+        self.pre_norm_layer = nn.LayerNorm(hidden_size)
+        self.post_norm_layer = nn.LayerNorm(hidden_size)
+        self.fc1 = nn.Linear(hidden_size, hidden_size * 4)
+        self.fc2 = nn.Linear(hidden_size * 4, hidden_size)
+
+        self.dropout_layer = nn.Dropout(act_dropout)
+        self.gelu_layer = nn.GELU()
+
+    def forward(self, x, attn_mask, cache):
+        query = self.pre_norm_layer(x)
+        attn_output, new_cache = self.self_attn(query, None, None, attn_mask, cache)
+        attn_output = self.dropout_layer(attn_output)
+        attn_output = attn_output + x
+        ffd_input = self.post_norm_layer(attn_output)
+
+        ffd_output = self.fc1(ffd_input)
+        ffd_output = self.gelu_layer(ffd_output)
+        ffd_output = self.dropout_layer(ffd_output)
+
+        ffd_output = self.fc2(ffd_output)
+        ffd_output = self.dropout_layer(ffd_output)
+        out = ffd_output + attn_output
+
+        return out, new_cache
+
+    def gen_cache(self, key):
+        return self.self_attn.gen_cache(key)
+
+
+class Plato2Encoder(nn.Layer):
+
+    def __init__(self, vocab_size, type_size, max_position_seq_len, num_layers, n_head, hidden_size, attn_dropout,
+                 act_dropout):
+        super(Plato2Encoder, self).__init__()
+
+        self.n_head = n_head
+
+        self.word_embedding_layer = nn.Embedding(vocab_size, hidden_size)
+        self.sent_embedding_layer = nn.Embedding(type_size, hidden_size)
+        self.pos_embedding_layer = nn.Embedding(max_position_seq_len, hidden_size)
+
+        self.encoder_layers = []
+        for i in range(num_layers):
+            encoder_layer = Plato2EncoderLayer(n_head, hidden_size, attn_dropout, act_dropout)
+            self.encoder_layers.append(encoder_layer)
+            self.add_sublayer('layers.' + str(i), encoder_layer)
+        self.post_encoder_layer_norm = nn.LayerNorm(hidden_size)
+
+        self.dropout_layer = nn.Dropout(act_dropout)
+
+    def forward(self, caches, token_ids, type_ids, pos_ids, generation_mask, aux_emb=None):
+        out, self_attn_mask = self.gen_input(token_ids, type_ids, pos_ids, generation_mask, aux_emb)
+
+        new_caches = []
+        for i, encoder_layer in enumerate(self.encoder_layers):
+            out, new_cache = encoder_layer(out, self_attn_mask, caches[i])
+            new_caches.append(new_cache)
+
+        enc_output = self.post_encoder_layer_norm(out)
+        return enc_output, new_caches
+
+    def gen_input(self, token_ids, type_ids, pos_ids, input_mask, aux_emb=None):
+        token_emb_out = self.word_embedding_layer(token_ids)
+        type_emb_out = self.sent_embedding_layer(type_ids)
+        pos_emb_out = self.pos_embedding_layer(pos_ids)
+        emb_out = token_emb_out + type_emb_out + pos_emb_out
+
+        # auxiliary memory embeddings
+        if aux_emb is not None:
+            emb_out = paddle.concat([aux_emb, emb_out], axis=1)
+
+        emb_out = self.dropout_layer(emb_out)
+
+        # generate n-head self-attention mask
+        self_attn_mask = input_mask
+        self_attn_mask = paddle.scale(x=self_attn_mask, scale=1e4, bias=-1.0, bias_after_scale=False)
+        n_head_self_attn_mask = paddle.stack(x=[self_attn_mask] * self.n_head, axis=1)
+        n_head_self_attn_mask.stop_gradient = True
+
+        return emb_out, n_head_self_attn_mask
+
+    def gen_caches(self, key):
+        caches = [encoder_layer.gen_cache(key) for encoder_layer in self.encoder_layers]
+        return caches
+
+
+class NSP(nn.Layer):
+
+    def __init__(self, vocab_size, type_size, max_position_seq_len, num_layers, n_head, hidden_size, attn_dropout,
+                 act_dropout):
+        super(NSP, self).__init__()
+
+        self.n_head = n_head
+        self.hidden_size = hidden_size
+
+        self.word_embedding_layer = nn.Embedding(vocab_size, hidden_size)
+        self.sent_embedding_layer = nn.Embedding(type_size, hidden_size)
+        self.pos_embedding_layer = nn.Embedding(max_position_seq_len, hidden_size)
+
+        encoder_layer = nn.TransformerEncoderLayer(hidden_size, n_head, hidden_size * 4, act_dropout, 'gelu',
+                                                   attn_dropout, act_dropout, 'True')
+        encoder_norm = nn.LayerNorm(hidden_size)
+        self.encoder = nn.TransformerEncoder(encoder_layer, num_layers, encoder_norm)
+        self.fc1 = nn.Linear(hidden_size, hidden_size)
+        self.fc2 = nn.Linear(hidden_size, 2)
+
+        self.dropout_layer = nn.Dropout(act_dropout)
+        self.tanh_layer = nn.Tanh()
+        self.softmax = nn.Softmax()
+
+    def forward(self, inputs):
+        token_ids = inputs['token_ids']
+        type_ids = inputs['type_ids']
+        pos_ids = inputs['pos_ids']
+        attention_mask = inputs['attention_mask']
+        label_pos = inputs["label_pos"]
+
+        out, self_attn_mask = self.gen_input(token_ids, type_ids, pos_ids, attention_mask)
+        # [-1, seq_len, hidden_size]
+        enc_out = self.encoder(out, self_attn_mask)
+
+        enc_out = paddle.reshape(enc_out, [-1, self.hidden_size])
+        label_pos = paddle.cast(label_pos, 'int64')
+        out = paddle.gather(enc_out, label_pos)
+        pooled_out = self.fc1(out)
+        pooled_out = self.tanh_layer(pooled_out)
+
+        # [-1, 2]
+        logits = self.fc2(pooled_out)
+        probs = self.softmax(logits)
+
+        return probs
+
+    def gen_input(self, token_ids, type_ids, pos_ids, input_mask, aux_emb=None):
+        token_emb_out = self.word_embedding_layer(token_ids)
+        type_emb_out = self.sent_embedding_layer(type_ids)
+        pos_emb_out = self.pos_embedding_layer(pos_ids)
+        emb_out = token_emb_out + type_emb_out + pos_emb_out
+
+        # auxiliary memory embeddings
+        if aux_emb is not None:
+            emb_out = paddle.concat([aux_emb, emb_out], axis=1)
+
+        emb_out = self.dropout_layer(emb_out)
+
+        # generate n-head self-attention mask
+        self_attn_mask = input_mask
+        self_attn_mask = paddle.scale(x=self_attn_mask, scale=1e4, bias=-1.0, bias_after_scale=False)
+        n_head_self_attn_mask = paddle.stack(x=[self_attn_mask] * self.n_head, axis=1)
+        n_head_self_attn_mask.stop_gradient = True
+
+        return emb_out, n_head_self_attn_mask
+
+
+class Plato2InferModel(nn.Layer):
+
+    def __init__(self,
+                 nsp_reader,
+                 num_layers,
+                 n_head,
+                 hidden_size,
+                 vocab_size=8001,
+                 type_size=2,
+                 latent_type_size=20,
+                 max_position_seq_len=256,
+                 act_dropout=0.1,
+                 attn_dropout=0.1,
+                 max_dec_len=64,
+                 min_dec_len=1,
+                 topk=10):
+        super(Plato2InferModel, self).__init__()
+
+        self.nsp_reader = nsp_reader
+        self.num_layers = num_layers
+        self.latent_type_size = latent_type_size
+        self.max_dec_len = max_dec_len
+        self.min_dec_len = min_dec_len
+        self.topk = topk
+        self.unk_id = 0
+        self.bos_id = 1
+        self.eos_id = 2
+        self.mask_id = 8000
+        self.after_eos = paddle.ones([vocab_size]) * -1e9
+        self.after_eos[self.eos_id] = 0
+        self.is_cn = False
+        self.batch_size = 1
+
+        self.latent_weight = paddle.create_parameter([hidden_size, latent_type_size], 'float32')
+
+        self.plato2_encoder = Plato2Encoder(vocab_size, type_size, max_position_seq_len, num_layers, n_head,
+                                            hidden_size, attn_dropout, act_dropout)
+
+        self.logits_fc_layer = nn.Linear(hidden_size, hidden_size)
+        self.logits_layer_norm = nn.LayerNorm(hidden_size)
+        self.logits_bias = paddle.create_parameter([vocab_size], 'float32', is_bias=True)
+
+        self.nsp_predictor = NSP(vocab_size, type_size, max_position_seq_len, num_layers, n_head, hidden_size,
+                                 attn_dropout, act_dropout)
+
+        self.gelu_layer = nn.GELU()
+        self.softmax = nn.Softmax()
+
+    @paddle.no_grad()
+    def forward(self, inputs):
+        token_ids = inputs['token_ids']
+        type_ids = inputs['type_ids']
+        pos_ids = inputs['pos_ids']
+        generation_mask = inputs['generation_mask']
+        latent_id = inputs['latent_id']
+        data_id = inputs['data_id']
+
+        # [-1, 1, latent_type_size]
+        latent_id = F.one_hot(latent_id, self.latent_type_size)
+        # [-1, 1, hidden_size]
+        latent_emb = paddle.matmul(latent_id, self.latent_weight, transpose_y=True)
+
+        caches = self.plato2_encoder.gen_caches(token_ids)
+
+        # [-1, seq_len + 1, hidden_size]
+        enc_out, new_caches = self.plato2_encoder(caches, token_ids, type_ids, pos_ids, generation_mask, latent_emb)
+
+        pred_ids = self.decode(inputs, new_caches)
+
+        nsp_inputs = self.gen_nsp_input(token_ids, pred_ids)
+        # [-1, 2]
+        probs = self.nsp_predictor(nsp_inputs)
+
+        return self.get_results(data_id, token_ids, pred_ids, probs)
+
+    def decode(self, inputs, caches):
+        tgt_ids = inputs['tgt_ids']
+        tgt_pos = inputs['tgt_pos']
+        tgt_generation_mask = inputs['tgt_generation_mask']
+        predictions = tgt_ids
+
+        # TODO
+        step = 0
+        while step < self.max_dec_len:
+            # [-1, 1]
+            append_mask = paddle.cast(tgt_ids != self.eos_id, dtype=tgt_generation_mask.dtype)
+            tgt_generation_mask = paddle.concat([tgt_generation_mask, paddle.unsqueeze(append_mask, 1)], axis=-1)
+            tgt_sent = paddle.ones([tgt_generation_mask.shape[0], 1], dtype=tgt_ids.dtype)
+
+            # [-1, 1, hidden_size]
+            out, caches = self.plato2_encoder(caches, tgt_ids, tgt_sent, tgt_pos, tgt_generation_mask)
+            out = paddle.squeeze(out, axis=1)
+
+            # [-1, hidden_size]
+            trans = self.logits_fc_layer(out)
+            trans = self.gelu_layer(trans)
+            trans = self.logits_layer_norm(trans)
+
+            # [-1, vocab_size]
+            logits = paddle.matmul(trans, self.plato2_encoder.word_embedding_layer.weight,
+                                   transpose_y=True) + self.logits_bias
+            logits[:, self.unk_id] = -1e9
+            logits[:, self.bos_id] = -1e9
+            logits[:, self.mask_id] = -1e9
+            if step < self.min_dec_len:
+                logits[:, self.eos_id] = -1e9
+            logits = logits * append_mask + (1 - append_mask) * self.after_eos
+            probs = self.softmax(logits)
+
+            # [-1, topk]
+            topk_probs, _ = paddle.topk(probs, k=self.topk)
+            mask = paddle.cast(probs >= topk_probs[:, -1:], 'float32')
+            sums = paddle.sum(topk_probs, axis=-1, keepdim=True)
+            new_probs = probs * mask / sums
+            # [-1, 1]
+            sampling_ids = paddle.multinomial(new_probs)
+
+            step = step + 1
+            tgt_ids = sampling_ids
+            tgt_pos = tgt_pos + 1
+            predictions = paddle.concat([predictions, tgt_ids], axis=1)
+        return predictions
+
+    def gen_nsp_input(self, token_ids, pred_ids):
+        token_ids = token_ids.numpy()
+        pred_ids = pred_ids.numpy()
+
+        def __reader__():
+            headers = ["src", "tgt", "data_id"]
+
+            Example = namedtuple("Example", headers)
+
+            for i, (raw, pred) in enumerate(zip(token_ids, pred_ids)):
+                context = post_process_context(raw, self.nsp_reader, merge=False)
+                _, response = post_process_response(pred, self.nsp_reader, merge=False)
+                context_tokenized_input = " [SEP] ".join(" ".join(utt) for utt in context)
+                response_tokenized_input = " ".join(response)
+                example = Example(src=context_tokenized_input, tgt=response_tokenized_input, data_id=i)
+                data = self.nsp_reader._convert_example_to_record(example, is_infer=True)
+                yield data
+            return
+
+        generator = self.nsp_reader.data_generator(
+            reader=__reader__,
+            is_infer=True,
+            phase="test",
+        )
+        inputs = next(generator())
+
+        #print('\nnsp_inputs:')
+        for key in inputs:
+            inputs[key] = paddle.to_tensor(inputs[key])
+            if key in ['token_ids', 'type_ids', 'pos_ids']:
+                inputs[key] = paddle.squeeze(inputs[key], axis=-1)
+            #print(key, inputs[key].shape)
+            #print(inputs[key])
+        return inputs
+
+    def get_results(self, data_id, token_ids, pred_ids, probs):
+        data_id = data_id.numpy()
+        token_ids = token_ids.numpy()
+        pred_ids = pred_ids.numpy()
+        probs = probs.numpy()
+
+        infos = []
+        for raw, pred, prob in zip(token_ids, pred_ids, probs):
+            tokens = post_process_context(raw, self.nsp_reader)
+            pred_token_ids, pred_tokens = post_process_response(pred, self.nsp_reader)
+            info = {}
+            info['response'] = ' '.join(pred_tokens)
+            cross_turn_repetition = get_cross_turn_repetition(tokens, pred_tokens, self.nsp_reader.eos_id, self.is_cn)
+            in_turn_repetition = max(get_in_turn_repetition(pred_tokens, self.is_cn),
+                                     get_in_turn_repetition(pred_token_ids))
+
+            info['score'] = float(prob[1])
+            if len(pred_token_ids) >= self.max_dec_len:
+                info['score'] -= 1e3
+            elif cross_turn_repetition > 0:
+                info['score'] -= 1e3
+            elif in_turn_repetition > 0:
+                info['score'] -= 1e3
+            infos.append(info)
+
+        results = []
+        pre_idx = 0
+        sample = []
+        for idx, info in zip(data_id, infos):
+            if idx != pre_idx:
+                sample = sorted(sample, key=lambda info: -info["score"])
+                result = sample[0]
+                result['data_id'] = pre_idx
+                results.apeend(result)
+                sample = []
+                pre_idx = idx
+            sample.append(info)
+        if sample:
+            sample = sorted(sample, key=lambda info: -info["score"])
+            result = sample[0]
+            result['data_id'] = pre_idx
+            results.append(result)
+        return results

modules/text/text_generation/plato2_en_base/models/__init__.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Define model."""
-
-from plato2_en_base.models.model_base import Model
-
-MODEL_REGISTRY = {}
-
-__all__ = ["MODEL_REGISTRY", "register_model", "create_model", "add_cmdline_args"]
-
-
-def register_model(name):
-    """
-    Register a new model class.
-    """
-
-    def __wrapped__(cls):
-        if name in MODEL_REGISTRY:
-            raise ValueError(f"Cannot register duplicate model ({name})")
-        if not issubclass(cls, Model):
-            raise ValueError(f"Model ({name}: {cls.__name__}) must extend Model")
-        MODEL_REGISTRY[name] = cls
-        return cls
-
-    return __wrapped__
-
-
-def create_model(args, place) -> Model:
-    """
-    Create a model.
-    """
-    return MODEL_REGISTRY[args.model](args, place)
-
-
-def add_cmdline_args(parser):
-    """ Add cmdline argument of Model. """
-    group = parser.add_argument_group("Model")
-
-    # Model
-    group.add_argument("--model", type=str, required=True)
-
-    # Config
-    group.add_argument("--config_path", type=str, required=True)
-
-    # Model related.
-    args, _ = parser.parse_known_args()
-    if args.model not in MODEL_REGISTRY:
-        raise ValueError(f"Unknown model type: {args.model}")
-    MODEL_REGISTRY[args.model].add_cmdline_args(parser)
-    return group
-
-
-import plato2_en_base.models.nsp_model
-import plato2_en_base.models.plato

modules/text/text_generation/plato2_en_base/models/generator.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Generator class"""
-
-import numpy as np
-import paddle.fluid.layers as layers
-
-from plato2_en_base.utils.args import str2bool
-
-
-class Generator(object):
-    """
-    Generator class
-
-    Use generator in inference phase.
-    """
-
-    @classmethod
-    def add_cmdline_args(cls, parser):
-        """Add cmdline argurments."""
-        group = parser.add_argument_group("Generator")
-        group.add_argument("--min_dec_len", type=int, default=1)
-        group.add_argument("--max_dec_len", type=int, default=64)
-
-        group.add_argument(
-            "--decoding_strategy",
-            type=str,
-            default="topk_sampling",
-            choices=["beam_search", "topk_sampling", "topp_sampling"])
-        group.add_argument("--temperature", type=float, default=1.)
-        group.add_argument("--ignore_unk", type=str2bool, default=True)
-
-        # multi sampling
-        group.add_argument("--num_samples", type=int, default=None)
-
-        # top-k sampling
-        group.add_argument("--topk", type=int, default=10)
-
-        # top-p sampling
-        group.add_argument("--topp", type=float, default=0.9)
-
-        # beam search
-        group.add_argument("--beam_size", type=int, default=10)
-        group.add_argument("--length_average", type=str2bool, default=True)
-        group.add_argument("--length_penalty", type=float, default=0.0)
-
-        return group
-
-    def __init__(self, args):
-        self.min_dec_len = args.min_dec_len
-        self.max_dec_len = args.max_dec_len
-        self.eos_id = args.eos_id
-        self.unk_id = args.unk_id
-        self.mask_id = args.mask_id
-        self.vocab_size = args.vocab_size
-
-        # model related
-
-        # basic settings
-        self.decoding_strategy = args.decoding_strategy
-        self.ignore_unk = args.ignore_unk
-        self.continuous_position = args.continuous_position
-        self.temperature = args.temperature
-
-        # reranking
-        self.num_samples = args.num_samples
-
-        # top-k sampling
-        self.topk = args.topk
-
-        # top-p sampling
-        self.topp = args.topp
-
-        # beam search
-        self.beam_size = args.beam_size
-        self.length_penalty = args.length_penalty
-        self.length_average = args.length_average
-        return
-
-    def inference(self, model, inputs, outputs):
-        """
-        Run inference.
-
-        Args:
-            inputs(dict): Its key is input name(str) and its value is a Variable.
-            model(object): A generate model. Need to implement `_generation_network` and `_calc_logits`.
-
-        Returns:
-            dict(str:Variable): Its key is output name(str) and its value is a Variable.
-        """
-        # prepare while loop
-        max_len = layers.fill_constant(shape=[1], dtype="int64", value=self.max_dec_len, force_cpu=True)
-        min_len = layers.fill_constant(shape=[1], dtype="int64", value=self.min_dec_len, force_cpu=True)
-        step_idx = layers.fill_constant(shape=[1], dtype="int64", value=0, force_cpu=True)
-
-        ids = layers.array_write(layers.reshape(inputs["tgt_ids"], (-1, 1)), step_idx)
-        pos_biases = layers.array_write(layers.reshape(inputs["tgt_pos"], (-1, 1)), step_idx)
-        scores = layers.array_write(inputs["init_score"], step_idx)
-        tgt_generation_mask = layers.array_write(inputs["tgt_generation_mask"], step_idx)
-        parent_idx = inputs["parent_idx"]
-
-        if self.decoding_strategy == "beam_search":
-            beam_size = self.beam_size
-        else:
-            beam_size = 1
-
-        eos_penalty = np.zeros(self.vocab_size, dtype="float32")
-        eos_penalty[self.eos_id] = -1e9
-        eos_penalty = layers.assign(eos_penalty)
-
-        token_penalty = np.zeros(self.vocab_size, dtype="float32")
-        token_penalty[self.unk_id] = -1e9
-        if self.mask_id >= 0:
-            token_penalty[self.mask_id] = -1e9
-        token_penalty = layers.assign(token_penalty)
-
-        # start while loop
-        cond = layers.less_than(x=step_idx, y=max_len)
-        while_op = layers.While(cond)
-        with while_op.block():
-            pre_ids = layers.array_read(array=ids, i=step_idx)
-            pre_ids = layers.reshape(pre_ids, (-1, 1, 1), inplace=True)
-            pre_scores = layers.array_read(array=scores, i=step_idx)
-            pos_bias = layers.array_read(array=pos_biases, i=step_idx)
-            pos_bias = layers.gather(input=pos_bias, index=parent_idx)
-
-            tmp_tgt_generation_mask = layers.array_read(tgt_generation_mask, i=step_idx)
-            dtype = tmp_tgt_generation_mask.dtype
-
-            append_mask = layers.fill_constant_batch_size_like(input=pre_ids, value=1.0, shape=[-1, 1, 1], dtype=dtype)
-            tmp_tgt_generation_mask = layers.concat([tmp_tgt_generation_mask, append_mask], axis=2)
-            pre_mask = tmp_tgt_generation_mask = layers.gather(input=tmp_tgt_generation_mask, index=parent_idx)
-
-            pre_sent = layers.fill_constant_batch_size_like(
-                input=pre_mask, value=1, shape=[-1, 1, 1], dtype=pre_ids.dtype)
-
-            if self.continuous_position:
-                pre_pos = layers.elementwise_mul(
-                    x=layers.fill_constant_batch_size_like(
-                        input=pre_mask, value=1, shape=[-1, 1, 1], dtype=pre_ids.dtype),
-                    y=step_idx,
-                    axis=0) + pos_bias
-            else:
-                pre_pos = layers.elementwise_mul(
-                    x=layers.fill_constant_batch_size_like(
-                        input=pre_mask, value=1, shape=[-1, 1, 1], dtype=pre_ids.dtype),
-                    y=step_idx,
-                    axis=0)
-
-            dec_out, _ = model._generation_network(
-                token_ids=pre_ids,
-                type_ids=pre_sent,
-                pos_ids=pre_pos,
-                generation_mask=tmp_tgt_generation_mask,
-                gather_idx=parent_idx)
-            logits = model._calc_logits(dec_out)
-
-            # ignore unk and mask token
-            if self.ignore_unk:
-                logits = layers.elementwise_add(logits, token_penalty, axis=1)
-
-            # min dec length
-            min_len_cond = layers.less_than(x=step_idx, y=min_len)
-
-            def min_len_penalty():
-                """Plus minimum length penalty."""
-                return layers.elementwise_add(logits, eos_penalty, axis=1)
-
-            def no_penalty():
-                """No penalty."""
-                return logits
-
-            logits = layers.case([(min_len_cond, min_len_penalty)], default=no_penalty)
-
-            # get probs
-            probs = layers.softmax(logits / self.temperature)
-
-            if self.decoding_strategy == "beam_search":
-                topk_scores, topk_indices = layers.topk(input=probs, k=beam_size)
-            else:
-                if self.decoding_strategy.startswith("sampling"):
-                    sampling_ids = layers.sampling_id(probs, dtype="int")
-                elif self.decoding_strategy.startswith("topk_sampling"):
-                    topk_probs, _ = layers.topk(input=probs, k=self.topk)
-                    ge_cond = layers.cast(
-                        layers.greater_equal(probs, layers.unsqueeze(topk_probs[:, -1], [1])), "float32")
-                    old_probs = probs
-                    probs = probs * ge_cond / layers.reduce_sum(topk_probs, dim=-1, keep_dim=True)
-                    sampling_ids = layers.sampling_id(probs, dtype="int")
-                    probs = old_probs
-                elif self.decoding_strategy.startswith("topp_sampling"):
-                    sorted_probs, sorted_idx = layers.argsort(probs, descending=True)
-                    cum_sorted_probs = layers.cumsum(sorted_probs, axis=1, exclusive=True)
-                    lt_cond = layers.cast(
-                        layers.less_than(
-                            cum_sorted_probs,
-                            layers.fill_constant_batch_size_like(cum_sorted_probs, cum_sorted_probs.shape,
-                                                                 cum_sorted_probs.dtype, self.topp)), "float32")
-                    old_probs = probs
-                    candidate_probs = sorted_probs * lt_cond
-                    probs = candidate_probs / layers.reduce_sum(candidate_probs, dim=-1, keep_dim=True)
-                    sampling_ids = layers.sampling_id(probs, dtype="int")
-                    sampling_ids = layers.index_sample(sorted_idx, layers.unsqueeze(sampling_ids, [1]))
-                    sampling_ids = layers.squeeze(sampling_ids, [1])
-                    probs = old_probs
-                else:
-                    raise ValueError(self.decoding_strategy)
-
-                sampling_scores = layers.one_hot(layers.unsqueeze(sampling_ids, [1]), probs.shape[1])
-                sampling_scores = sampling_scores * probs - (1 - sampling_scores) * 1e3
-                topk_scores, topk_indices = layers.topk(input=sampling_scores, k=1)
-
-            pre_len = layers.cast(step_idx, "float32")
-            layers.increment(x=step_idx, value=1.0, in_place=True)
-            cur_len = layers.cast(step_idx, "float32")
-
-            # update scores
-            if self.length_average:
-                accu_scores = layers.elementwise_add(
-                    x=layers.log(topk_scores), y=pre_scores * pre_len, axis=0) / cur_len
-            elif self.length_penalty > 0:
-                pre_lp = layers.pow((5 + pre_len) / 6, self.length_penalty)
-                cur_lp = layers.pow((5 + cur_len) / 6, self.length_penalty)
-                accu_scores = layers.elementwise_add(x=layers.log(topk_scores), y=pre_scores * pre_lp, axis=0) / cur_lp
-            else:
-                accu_scores = layers.elementwise_add(x=layers.log(topk_scores), y=pre_scores, axis=0)
-            topk_indices = layers.lod_reset(topk_indices, pre_ids)
-            accu_scores = layers.lod_reset(accu_scores, pre_ids)
-            selected_ids, selected_scores, gather_idx = layers.beam_search(
-                pre_ids=pre_ids,
-                pre_scores=pre_scores,
-                ids=topk_indices,
-                scores=accu_scores,
-                beam_size=beam_size,
-                end_id=self.eos_id,
-                return_parent_idx=True)
-
-            layers.array_write(selected_ids, i=step_idx, array=ids)
-            layers.array_write(selected_scores, i=step_idx, array=scores)
-            layers.array_write(pre_mask, i=step_idx, array=tgt_generation_mask)
-            layers.array_write(pos_bias, i=step_idx, array=pos_biases)
-
-            layers.assign(gather_idx, parent_idx)
-
-            length_cond = layers.less_than(x=step_idx, y=max_len)
-            finish_cond = layers.logical_not(layers.is_empty(x=selected_ids))
-            layers.logical_and(x=length_cond, y=finish_cond, out=cond)
-
-        finished_ids, finished_scores = layers.beam_search_decode(ids, scores, beam_size=beam_size, end_id=self.eos_id)
-
-        predictions = {
-            "finished_ids": finished_ids,
-            "finished_scores": finished_scores,
-            "token_ids": inputs["token_ids"],
-            "data_id": inputs["data_id"]
-        }
-        return predictions

modules/text/text_generation/plato2_en_base/models/model_base.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Model base."""
-
-from abc import abstractmethod, ABC
-
-import paddle.fluid as fluid
-from paddle.fluid.incubate.fleet.collective import fleet, DistributedStrategy
-import paddle.fluid.incubate.fleet.base.role_maker as role_maker
-import paddle.fluid.layers as layers
-
-from plato2_en_base.models.optimizer import AdamW
-from plato2_en_base.utils import init_pretraining_params, init_checkpoint, to_lodtensor
-from plato2_en_base.utils.args import str2bool
-
-
-class Model(ABC):
-    """
-    Basic model wrapper for paddle.
-    """
-
-    @classmethod
-    def add_cmdline_args(cls, parser):
-        """Add cmdline argurments."""
-        group = parser.add_argument_group("Model")
-        # Init checkpoint
-        group.add_argument("--init_checkpoint", type=str, default="")
-        group.add_argument("--init_pretraining_params", type=str, default="")
-
-        # Optimizer
-        group.add_argument("-lr", "--learning_rate", type=float, default=1e-5, help="The learning rate for optimizer.")
-        group.add_argument("--warmup_steps", type=int, default=0, help="The warmup steps.")
-        group.add_argument("--weight_decay", type=float, default=0.0, help="The weight decay for optimizer.")
-        group.add_argument("--max_grad_norm", type=float, default=.1, help="The maximum norm of gradient.")
-
-        group.add_argument("--use_recompute", type=str2bool, default=False)
-        group.add_argument("--use_amp", type=str2bool, default=False)
-        group.add_argument("--amp_loss_scaling", type=float, default=12800)
-        return group
-
-    def __init__(self, args, place):
-        self.place = place
-        self.exe = fluid.Executor(place)
-
-        self.init_checkpoint = args.init_checkpoint
-        self.init_pretraining_params = args.init_pretraining_params
-
-        self.learning_rate = args.learning_rate
-        self.warmup_steps = args.warmup_steps
-        self.weight_decay = args.weight_decay
-        self.max_grad_norm = args.max_grad_norm
-
-        self.is_distributed = args.is_distributed
-        self.use_recompute = args.use_recompute
-        self.use_amp = args.use_amp
-        self.amp_loss_scaling = args.amp_loss_scaling
-        self.run_infer = args.get("run_infer", False)
-        self.batch_size = args.get("batch_size", 1)
-        self._build_programs()
-        return
-
-    def _build_programs(self):
-        """
-        Build programs.
-
-        Build train_program, eval_program and inference_program. Only use in static graph mode.
-        """
-        if self.run_infer:
-            self.startup_program = fluid.Program()
-            # build infer program
-            self.infer_program = fluid.Program()
-            with fluid.program_guard(self.infer_program, self.startup_program):
-                with fluid.unique_name.guard():
-                    self.infer_feed_dict = inputs = self._get_feed_dict(is_infer=True)
-                    outputs = self.forward(inputs, is_infer=True)
-                    predictions = self.infer(inputs, outputs)
-                    self.infer_fetch_dict = predictions
-            self.infer_program = self.infer_program.clone(for_test=True)
-
-            self.program = self.infer_program
-        else:
-            if self.is_distributed:
-                exec_strategy = fluid.ExecutionStrategy()
-                exec_strategy.use_experimental_executor = True
-                exec_strategy.num_threads = 4
-                exec_strategy.num_iteration_per_drop_scope = 1
-
-                dist_strategy = DistributedStrategy()
-                dist_strategy.exec_strategy = exec_strategy
-                dist_strategy.nccl_comm_num = 1
-                dist_strategy.fuse_all_reduce_ops = True
-                if self.use_recompute:
-                    dist_strategy.forward_recompute = True
-                    dist_strategy.enable_sequential_execution = True
-                if self.use_amp:
-                    dist_strategy.use_amp = True
-                    dist_strategy.amp_loss_scaling = self.amp_loss_scaling
-                self.dist_strategy = dist_strategy
-
-            self.startup_program = fluid.Program()
-            # build train program
-            self.train_program = fluid.Program()
-            with fluid.program_guard(self.train_program, self.startup_program):
-                with fluid.unique_name.guard():
-                    self.feed_dict = inputs = self._get_feed_dict()
-                    outputs = self.forward(inputs)
-                    if self.is_distributed and self.use_recompute:
-                        self.dist_strategy.recompute_checkpoints = outputs["checkpoints"]
-                    metrics, statistics = self.get_metrics_and_statistics(inputs, outputs)
-
-                    # build eval program
-                    self.eval_program = self.train_program.clone(for_test=True)
-                    self.eval_fetch_dict = {**metrics, **statistics}
-
-                    scheduled_lr = self.optimize(metrics)
-                    metrics["scheduled_lr"] = scheduled_lr
-                    self.train_fetch_dict = metrics
-
-            self.program = self.train_program
-            if self.is_distributed:
-                self.train_program = fleet.main_program
-
-        self.exe.run(self.startup_program)
-        if self.init_pretraining_params != "":
-            init_pretraining_params(self.exe, self.init_pretraining_params, self.program)
-        elif self.init_checkpoint != "":
-            init_checkpoint(self.exe, self.init_checkpoint, self.program)
-        return
-
-    def load(self, model_dir, is_checkpoint=False):
-        """
-        Load persistables or parameters.
-        """
-        # TODO: support dygraph.
-        if is_checkpoint:
-            init_checkpoint(self.exe, model_dir, self.program)
-        else:
-            init_pretraining_params(self.exe, model_dir, self.program)
-        return
-
-    def save(self, model_dir, is_checkpoint=False):
-        """
-        Save persistables or parameters.
-        """
-        # TODO: support dygraph.
-        if is_checkpoint:
-            fluid.io.save_persistables(self.exe, model_dir, self.program)
-        else:
-            fluid.io.save_params(self.exe, model_dir, self.program)
-        return
-
-    @abstractmethod
-    def _get_feed_dict(self, is_infer=False):
-        """
-        Return input feed list.
-        """
-        pass
-
-    def _get_feed(self, inputs, is_infer=False):
-        """
-        Convert `inputs` into model's feed data format.
-        """
-        if isinstance(inputs, list):
-            # return list direclty which is used in `get_data_loader`.
-            return inputs
-        for k in inputs:
-            if isinstance(inputs[k], list):
-                inputs[k] = to_lodtensor(inputs[k], self.place)
-        return inputs
-
-    def get_data_loader(self, generator=None, is_infer=False):
-        """
-        Return DataLoader.
-
-        If generator is not `None`, the data loader set it as the batch generator.
-        """
-        # TODO: support dygraph.
-        if is_infer:
-            feed_name_list, feed_list = zip(*self.infer_feed_dict.items())
-        else:
-            feed_name_list, feed_list = zip(*self.feed_dict.items())
-        loader = fluid.io.DataLoader.from_generator(
-            feed_list=feed_list, capacity=64, use_double_buffer=True, iterable=True)
-        if generator is not None:
-
-            def __wrapper__():
-                for batch in generator():
-                    batch = self._get_feed(batch)
-                    batch = [batch[name] for name in feed_name_list if name in batch]
-                    yield batch
-
-            loader.set_batch_generator(__wrapper__, self.place)
-        return loader
-
-    @abstractmethod
-    def forward(self, inputs, is_infer=False):
-        """
-        Run model main forward.
-        """
-        pass
-
-    @abstractmethod
-    def get_metrics_and_statistics(self, inputs, outputs):
-        """
-        Get metrics and statistics.
-        """
-        pass
-
-    @abstractmethod
-    def infer(self, inputs, outputs):
-        """
-        Run model inference.
-        """
-        pass
-
-    def optimize(self, metrics):
-        """
-        Optimize the model by metrics(mainly `metrics["loss"]`).
-        """
-        # TODO: support dygraph
-        if self.warmup_steps > 0:
-            scheduled_lr = layers.learning_rate_scheduler.noam_decay(1 / (self.warmup_steps * (self.learning_rate**2)),
-                                                                     self.warmup_steps)
-        else:
-            scheduled_lr = layers.create_global_var(
-                name=fluid.unique_name.generate("learning_rate"),
-                shape=[1],
-                value=self.learning_rate,
-                dtype="float32",
-                persistable=True)
-        grad_clip = fluid.clip.GradientClipByGlobalNorm(self.max_grad_norm)
-
-        self.optimizer = AdamW(learning_rate=scheduled_lr, grad_clip=grad_clip, weight_decay=self.weight_decay)
-
-        if self.is_distributed:
-            self.optimizer = fleet.distributed_optimizer(self.optimizer, strategy=self.dist_strategy)
-
-        self.optimizer.minimize(metrics["loss"])
-        return scheduled_lr
-
-    def _execute(self, program, feed, fetch_dict, **kwargs):
-        """
-        Execute program.
-        """
-        fetch_list = [var.name for var in fetch_dict.values()]
-        fetch_vars = self.exe.run(program, feed, fetch_list, **kwargs)
-        return dict(zip(fetch_dict.keys(), fetch_vars))
-
-    def train_step(self, inputs):
-        """
-        Run one training step.
-        """
-        # TODO: support dygraph.
-        return self._execute(self.train_program, self._get_feed(inputs), self.train_fetch_dict, use_program_cache=True)
-
-    def eval_step(self, inputs):
-        """
-        Run one evaluation step.
-        """
-        # TODO: support dygraph.
-        return self._execute(self.eval_program, self._get_feed(inputs), self.eval_fetch_dict)
-
-    def infer_step(self, inputs):
-        """
-        Run one inference step.
-        """
-        # TODO: support dygraph.
-        return self._execute(self.infer_program, self._get_feed(inputs, is_infer=True), self.infer_fetch_dict)
-
-    def save_inference_model(self, inference_model_path):
-        """
-        Save the inference model.
-        """
-        feed_list = [var.name for var in self.infer_feed_dict.values()]
-        fetch_list = list(self.infer_fetch_dict.values())
-
-        fluid.io.save_inference_model(inference_model_path, feed_list, fetch_list, self.exe, self.infer_program)

modules/text/text_generation/plato2_en_base/models/nsp_model.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""NSP model."""
-
-import paddle.fluid as fluid
-import paddle.fluid.layers as layers
-
-from . import register_model
-from .model_base import Model
-from .unified_transformer import UnifiedTransformer
-
-
-@register_model("NSPModel")
-class NSPModel(UnifiedTransformer):
-    """NSP model."""
-
-    def _get_feed_dict(self, is_infer=False):
-        """
-        Get the feed list of the model.
-
-        Args:
-            is_infer(bool): True if running inference.
-
-        Returns:
-            list(Variable): The feed list.
-            list(str): The name of each Variable in feed list.
-        """
-        feed_dict = {}
-        feed_dict["token_ids"] = layers.data(name="token_ids", shape=[-1, self.max_seq_len, 1], dtype="int64")
-        feed_dict["type_ids"] = layers.data(name="type_ids", shape=[-1, self.max_seq_len, 1], dtype="int64")
-        feed_dict["pos_ids"] = layers.data(name="pos_ids", shape=[-1, self.max_seq_len, 1], dtype="int64")
-
-        feed_dict["attention_mask"] = layers.data(
-            name="attention_mask", shape=[-1, self.max_seq_len, self.max_seq_len], dtype=self.dtype)
-        feed_dict["label_pos"] = layers.data(name="label_pos", shape=[-1, 1], dtype="int64")
-
-        if not is_infer:
-            feed_dict["label"] = layers.data(name="label", shape=[-1, 1], dtype="int64")
-            feed_dict["tgt_label"] = layers.data(name="tgt_ids", shape=[-1, 1], dtype="int64")
-            feed_dict["tgt_pos"] = layers.data(name="tgt_pos", shape=[-1, 1], dtype="int64")
-
-        feed_dict["data_id"] = layers.data(name="data_id", shape=[-1, 1], dtype="int64")
-        return feed_dict
-
-    def _get_feed(self, inputs, is_infer=False):
-        return Model._get_feed(self, inputs, is_infer)
-
-    def forward(self, inputs, is_infer=False):
-        outputs = {}
-        self.generation_caches = None
-        outputs["enc_out"], self.checkpoints = self._generation_network(
-            token_ids=inputs["token_ids"],
-            type_ids=inputs["type_ids"],
-            pos_ids=inputs["pos_ids"],
-            generation_mask=inputs["attention_mask"])
-        return outputs
-
-    def _get_metrics(self, inputs, outputs):
-        metrics = {}
-        fc_out = self._calc_logits(outputs["enc_out"], inputs["tgt_pos"])
-        lm_loss = layers.softmax_with_cross_entropy(logits=fc_out, label=inputs["tgt_pos"])
-        need_cal = layers.not_equal(inputs["tgt_label"], layers.fill_constant(shape=[1], dtype="int64", value=1))
-        need_cal = layers.cast(need_cal, self.dtype)
-        mean_lm_loss = layers.reduce_sum(lm_loss * need_cal) / (layers.reduce_sum(need_cal) + 1e-10)
-
-        pooled_out = self._get_pooled_output(outputs["enc_out"], inputs["label_pos"])
-        nsp_fc_out = layers.fc(
-            input=pooled_out,
-            size=2,
-            param_attr=fluid.ParamAttr(name="next_sent_fc.w_0", initializer=self.param_initializer),
-            bias_attr="next_sent_fc.b_0")
-        nsp_loss, nsp_softmax = layers.softmax_with_cross_entropy(
-            logits=nsp_fc_out, label=inputs["label"], return_softmax=True)
-
-        nsp_acc = layers.accuracy(nsp_softmax, inputs["label"])
-        mean_nsp_loss = layers.mean(nsp_loss)
-
-        metrics["loss"] = mean_lm_loss + mean_nsp_loss
-        metrics["lm_loss"] = mean_lm_loss
-        metrics["nsp_loss"] = mean_nsp_loss
-        metrics["nsp_acc"] = nsp_acc
-        return metrics
-
-    def infer(self, inputs, outputs):
-        pooled_out = self._get_pooled_output(outputs["enc_out"], inputs["label_pos"])
-        nsp_fc_out = layers.fc(
-            input=pooled_out,
-            size=2,
-            param_attr=fluid.ParamAttr(name="next_sent_fc.w_0", initializer=self.param_initializer),
-            bias_attr="next_sent_fc.b_0")
-        scores = layers.softmax(nsp_fc_out)
-        predictions = {"scores": scores, "data_id": inputs["data_id"]}
-        return predictions
-
-    def infer_step(self, inputs):
-        return Model.infer_step(self, inputs)

modules/text/text_generation/plato2_en_base/models/optimizer.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Optimizer."""
-
-import re
-
-import paddle.fluid as fluid
-import paddle.fluid.layers as layers
-
-
-class AdamW(fluid.optimizer.AdamOptimizer):
-    """AdamW object for dygraph"""
-
-    def __init__(self, *args, **kwargs):
-        weight_decay = kwargs.pop('weight_decay', None)
-        var_name_to_exclude = kwargs.pop('var_name_to_exclude', '.*layer_norm_scale|.*layer_norm_bias|.*b_0')
-        super(AdamW, self).__init__(*args, **kwargs)
-        self.wd = weight_decay
-        self.pat = re.compile(var_name_to_exclude)
-
-    def apply_optimize(self, loss, startup_program, params_grads):
-        """Update params with weight decay."""
-        super(AdamW, self).apply_optimize(loss, startup_program, params_grads)
-        for p, g in params_grads:
-            if not self.pat.match(p.name):
-                layers.assign(p * (1. - self.wd * self._learning_rate), p)

modules/text/text_generation/plato2_en_base/models/plato.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Plato model."""
-
-import numpy as np
-import paddle.fluid as fluid
-import paddle.fluid.layers as layers
-
-from . import register_model
-from .model_base import Model
-from .unified_transformer import UnifiedTransformer
-from .transformer_block import encoder, pre_process_layer
-from plato2_en_base.utils import repeat_array_or_tensor
-from plato2_en_base.utils.args import str2bool
-from .generator import Generator
-
-
-@register_model("Plato")
-class Plato(UnifiedTransformer):
-    """Plato model."""
-
-    @classmethod
-    def add_cmdline_args(cls, parser):
-        """Add cmdline argurments."""
-        group = UnifiedTransformer.add_cmdline_args(parser)
-        group.add_argument("--use_bow", type=str2bool, default=True)
-        group.add_argument("--use_entropy", type=str2bool, default=False)
-        return group
-
-    def __init__(self, args, place):
-        # latent related
-        self.mask_id = args.mask_id
-        self.latent_type_size = args.latent_type_size
-        self.latent_emb_name = "latent_embedding"
-        self.use_bow = args.use_bow
-        self.use_entropy = args.use_entropy
-
-        super(Plato, self).__init__(args, place)
-
-    def _get_feed_dict(self, is_infer=False):
-        feed_dict = {}
-        feed_dict["token_ids"] = layers.data(name="token_ids", shape=[-1, self.max_seq_len, 1], dtype="int64")
-        feed_dict["type_ids"] = layers.data(name="type_ids", shape=[-1, self.max_seq_len, 1], dtype="int64")
-        feed_dict["pos_ids"] = layers.data(name="pos_ids", shape=[-1, self.max_seq_len, 1], dtype="int64")
-
-        if not is_infer:
-            feed_dict["recognition_mask"] = layers.data(
-                name="recognition_mask", shape=[-1, self.max_seq_len + 1, self.max_seq_len + 1], dtype=self.dtype)
-        feed_dict["generation_mask"] = layers.data(
-            name="generation_mask", shape=[-1, self.max_seq_len + 1, self.max_seq_len + 1], dtype=self.dtype)
-
-        if is_infer:
-            feed_dict["tgt_ids"] = layers.data(
-                name="tgt_ids", shape=[-1, self.max_seq_len, 1], dtype="int64", lod_level=2)
-            feed_dict["tgt_pos"] = layers.data(
-                name="tgt_pos", shape=[-1, self.max_seq_len, 1], dtype="int64", lod_level=2)
-            feed_dict["init_score"] = layers.data(name="init_score", shape=[-1, 1], dtype="float32", lod_level=1)
-            feed_dict["parent_idx"] = layers.data(name="parent_idx", shape=[-1], dtype="int64")
-
-            feed_dict["tgt_generation_mask"] = layers.data(
-                name="tgt_generation_mask", shape=[-1, 1, self.max_seq_len + 1], dtype="float32")
-            feed_dict["latent_id"] = layers.data(name="latent_id", shape=[-1, 1], dtype="int64")
-        else:
-            feed_dict["tgt_label"] = layers.data(name="tgt_label", shape=[-1, 1], dtype="int64")
-            feed_dict["tgt_pos"] = layers.data(name="tgt_pos", shape=[-1, 1], dtype="int64")
-
-            if self.use_bow:
-                feed_dict["bow_label"] = layers.data(name="bow_label", shape=[-1, 1], dtype="int64")
-                feed_dict["bow_pos"] = layers.data(name="bow_pos", shape=[-1, 1], dtype="int64")
-
-        feed_dict["data_id"] = layers.data(name="data_id", shape=[-1, 1], dtype="int64")
-        return feed_dict
-
-    def _recognition_network(self, token_ids, type_ids, pos_ids, recognition_mask):
-        mask_id = layers.fill_constant_batch_size_like(
-            input=token_ids, shape=[-1, 1, 1], value=self.mask_id, dtype="int64")
-        mask_emb = layers.embedding(
-            input=mask_id,
-            size=[self.vocab_size, self.emb_size],
-            dtype=self.dtype,
-            param_attr=fluid.ParamAttr(name=self.token_emb_name, initializer=self.param_initializer))
-        emb_out, n_head_self_attn_mask = self._gen_input(
-            token_ids, type_ids, pos_ids, recognition_mask, aux_emb=mask_emb)
-
-        recognition_out, checkpoints = self._encode(emb_out, n_head_self_attn_mask)
-
-        recognition_feat = layers.slice(input=recognition_out, axes=[1], starts=[0], ends=[1])
-        recognition_feat = layers.fc(
-            input=recognition_feat,
-            size=self.hidden_size,
-            act="tanh",
-            param_attr=fluid.ParamAttr(name="recognition_fc.w_0", initializer=self.param_initializer),
-            bias_attr="recognition_fc.b_0")
-        logits = layers.fc(
-            input=recognition_feat,
-            size=self.latent_type_size,
-            param_attr=fluid.ParamAttr(name=self.latent_emb_name, initializer=self.param_initializer),
-            bias_attr="recognition_bias")
-        return logits, checkpoints
-
-    def _gumbel_softmax(self, logits, tau=0.67, eps=1e-10):
-        u = layers.uniform_random_batch_size_like(logits, shape=[-1, self.latent_type_size], min=0.0, max=1.0)
-        u.stop_gradient = True
-        gumbel = 0.0 - layers.log(eps - layers.log(u + eps))
-        y = logits + gumbel
-        return layers.softmax(y / tau)
-
-    def forward(self, inputs, is_infer=False):
-        """
-        Run model main forward.
-        """
-        outputs = {}
-        if is_infer:
-            self.generation_caches = [{
-                "k":
-                layers.fill_constant_batch_size_like(
-                    input=inputs["token_ids"], shape=[-1, 0, self.d_key * self.n_head], dtype=self.dtype, value=0),
-                "v":
-                layers.fill_constant_batch_size_like(
-                    input=inputs["token_ids"], shape=[-1, 0, self.d_value * self.n_head], dtype=self.dtype, value=0),
-            } for i in range(self.n_layer)]
-        else:
-            self.generation_caches = None
-
-        latent_embeddings = layers.create_parameter(
-            shape=[self.emb_size, self.latent_type_size],
-            dtype=self.dtype,
-            attr=fluid.ParamAttr(name=self.latent_emb_name, initializer=self.param_initializer))
-
-        if is_infer:
-            latent_id = inputs["latent_id"]
-            weights = layers.one_hot(latent_id, self.latent_type_size)
-        else:
-            logits, recognition_checkpoints = self._recognition_network(
-                token_ids=inputs["token_ids"],
-                type_ids=inputs["type_ids"],
-                pos_ids=inputs["pos_ids"],
-                recognition_mask=inputs["recognition_mask"],
-            )
-            outputs["post_probs"] = layers.softmax(logits)
-            weights = self._gumbel_softmax(logits)
-            outputs["checkpoints"] = recognition_checkpoints
-
-        latent_emb = layers.matmul(x=weights, y=latent_embeddings, transpose_y=True)
-        outputs["enc_out"], generation_checkpoints = self._generation_network(
-            token_ids=inputs["token_ids"],
-            type_ids=inputs["type_ids"],
-            pos_ids=inputs["pos_ids"],
-            generation_mask=inputs["generation_mask"],
-            aux_emb=layers.unsqueeze(latent_emb, axes=[1]),
-            gather_idx=inputs.get("parent_idx", None),
-        )
-
-        if not is_infer:
-            outputs["checkpoints"].extend(generation_checkpoints)
-        return outputs
-
-    def _calc_bow_logits(self, enc_out, checkpoints, bow_pos):
-        """Get the logits of generation."""
-        bow_feat = layers.slice(input=enc_out, axes=[1], starts=[0], ends=[1])
-        bow_feat = layers.reshape(x=bow_feat, shape=[-1, self.hidden_size])
-        bow_pos = layers.cast(x=bow_pos, dtype="int32")
-        bow_feat = layers.gather(input=bow_feat, index=bow_pos)
-
-        bow_trans_feat = layers.fc(
-            input=bow_feat,
-            size=self.emb_size,
-            act=self.hidden_act,
-            param_attr=fluid.ParamAttr(name="bow_trans_fc.w_0", initializer=self.param_initializer),
-            bias_attr=fluid.ParamAttr(name="bow_trans_fc.b_0"))
-
-        bow_trans_feat = pre_process_layer(bow_trans_feat, self.post_cls_cmd, name="bow_trans")
-
-        checkpoints.append(bow_trans_feat)
-
-        if self.weight_sharing:
-            fc_out = layers.matmul(
-                x=bow_trans_feat,
-                y=fluid.default_main_program().global_block().var(self.token_emb_name),
-                transpose_y=True)
-            if self.cls_bias:
-                fc_out += layers.create_parameter(
-                    shape=[self.vocab_size],
-                    dtype=self.dtype,
-                    attr=fluid.ParamAttr(name="bow_out_fc.b_0"),
-                    is_bias=True)
-        else:
-            bow_out_bias_attr = fluid.ParamAttr(name="bow_out_fc.b_0") if self.cls_bias else False
-            fc_out = layers.fc(
-                input=bow_trans_feat,
-                size=self.vocab_size,
-                param_attr=fluid.ParamAttr(name="bow_out_fc.w_0", initializer=self.param_initializer),
-                bias_attr=bow_out_bias_attr)
-        return fc_out
-
-    def _get_metrics(self, inputs, outputs):
-        metrics = super(Plato, self)._get_metrics(inputs, outputs)
-
-        if self.use_bow:
-            fc_out = self._calc_bow_logits(outputs["enc_out"], outputs["checkpoints"], inputs["bow_pos"])
-            bow_loss = layers.softmax_with_cross_entropy(logits=fc_out, label=inputs["bow_label"])
-            mean_bow_loss = layers.mean(bow_loss)
-            metrics["token_bow_loss"] = mean_bow_loss
-            metrics["loss"] = metrics["loss"] + mean_bow_loss
-
-        entropy_loss = layers.reduce_sum(outputs["post_probs"] * layers.log(outputs["post_probs"]), dim=1)
-        mean_entropy_loss = layers.mean(entropy_loss)
-        metrics["entropy_loss"] = mean_entropy_loss
-        if self.use_entropy:
-            metrics["loss"] = metrics["loss"] + mean_entropy_loss
-        return metrics
-
-    def infer_step(self, inputs):
-        """
-        Run one inference step.
-        """
-        if self.do_generation:
-            batch_size = len(inputs["data_id"])
-            new_bsz = batch_size * self.latent_type_size
-            inputs = {
-                name: repeat_array_or_tensor(array_or_tensor, self.place, self.latent_type_size)
-                for name, array_or_tensor in inputs.items()
-            }
-            # Add latent_id
-            inputs["latent_id"] = np.array([i for i in range(self.latent_type_size) for _ in range(batch_size)],
-                                           dtype="int64").reshape([-1, 1])
-
-            return super(Plato, self).infer_step(inputs)
-        else:
-            return self._execute(self.infer_program, self._get_feed(inputs, is_infer=True), self.infer_fetch_dict)

modules/text/text_generation/plato2_en_base/models/transformer_block.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Transformer block."""
-
-from functools import partial
-
-import paddle.fluid as fluid
-import paddle.fluid.layers as layers
-
-
-def multi_head_attention(queries,
-                         keys,
-                         values,
-                         attn_bias,
-                         d_key,
-                         d_value,
-                         d_model,
-                         n_head=1,
-                         dropout_rate=0.,
-                         cache=None,
-                         gather_idx=None,
-                         store=False,
-                         param_initializer=None,
-                         name="multi_head_att"):
-    """
-    Multi-Head Attention. Note that attn_bias is added to the logit before
-    computing softmax activiation to mask certain selected positions so that
-    they will not considered in attention weights.
-    """
-    keys = queries if keys is None else keys
-    values = keys if values is None else values
-
-    if not (len(queries.shape) == len(keys.shape) == len(values.shape) == 3):
-        raise ValueError("Inputs: quries, keys and values should all be 3-D tensors.")
-
-    def __compute_qkv(queries, keys, values, n_head, d_key, d_value):
-        """
-        Add linear projection to queries, keys, and values.
-        """
-        q = layers.fc(
-            input=queries,
-            size=d_key * n_head,
-            num_flatten_dims=2,
-            param_attr=fluid.ParamAttr(name=name + "_query_fc.w_0", initializer=param_initializer),
-            bias_attr=name + "_query_fc.b_0")
-        k = layers.fc(
-            input=keys,
-            size=d_key * n_head,
-            num_flatten_dims=2,
-            param_attr=fluid.ParamAttr(name=name + "_key_fc.w_0", initializer=param_initializer),
-            bias_attr=name + "_key_fc.b_0")
-        v = layers.fc(
-            input=values,
-            size=d_value * n_head,
-            num_flatten_dims=2,
-            param_attr=fluid.ParamAttr(name=name + "_value_fc.w_0", initializer=param_initializer),
-            bias_attr=name + "_value_fc.b_0")
-        return q, k, v
-
-    def __split_heads(x, n_head):
-        """
-        Reshape the last dimension of inpunt tensor x so that it becomes two
-        dimensions and then transpose. Specifically, input a tensor with shape
-        [bs, max_sequence_length, n_head * hidden_dim] then output a tensor
-        with shape [bs, n_head, max_sequence_length, hidden_dim].
-        """
-        hidden_size = x.shape[-1]
-        # The value 0 in shape attr means copying the corresponding dimension
-        # size of the input as the output dimension size.
-        reshaped = layers.reshape(x=x, shape=[0, 0, n_head, hidden_size // n_head], inplace=True)
-
-        # permuate the dimensions into:
-        # [batch_size, n_head, max_sequence_len, hidden_size_per_head]
-        return layers.transpose(x=reshaped, perm=[0, 2, 1, 3])
-
-    def __combine_heads(x):
-        """
-        Transpose and then reshape the last two dimensions of inpunt tensor x
-        so that it becomes one dimension, which is reverse to __split_heads.
-        """
-        if len(x.shape) == 3: return x
-        if len(x.shape) != 4:
-            raise ValueError("Input(x) should be a 4-D Tensor.")
-
-        trans_x = layers.transpose(x, perm=[0, 2, 1, 3])
-        # The value 0 in shape attr means copying the corresponding dimension
-        # size of the input as the output dimension size.
-        return layers.reshape(x=trans_x, shape=[0, 0, trans_x.shape[2] * trans_x.shape[3]], inplace=True)
-
-    def scaled_dot_product_attention(q, k, v, attn_bias, d_key, dropout_rate):
-        """
-        Scaled Dot-Product Attention
-        """
-        scaled_q = layers.scale(x=q, scale=d_key**-0.5)
-        product = layers.matmul(x=scaled_q, y=k, transpose_y=True)
-        if attn_bias:
-            product += attn_bias
-        weights = layers.softmax(product, use_cudnn=True)
-        if dropout_rate:
-            weights = layers.dropout(
-                weights, dropout_prob=dropout_rate, dropout_implementation="upscale_in_train", is_test=False)
-        out = layers.matmul(weights, v)
-        return out
-
-    q, k, v = __compute_qkv(queries, keys, values, n_head, d_key, d_value)
-
-    if cache is not None:  # use cache and concat time steps
-        # Since the inplace reshape in __split_heads changes the shape of k and
-        # v, which is the cache input for next time step, reshape the cache
-        # input from the previous time step first.
-        cache_k, cache_v = cache["k"], cache["v"]
-        select_k = layers.gather(cache_k, index=gather_idx)
-        select_v = layers.gather(cache_v, index=gather_idx)
-        select_k = layers.reshape(select_k, shape=[0, 0, d_key * n_head])
-        select_v = layers.reshape(select_v, shape=[0, 0, d_value * n_head])
-        if store:
-            k = layers.concat([select_k, k], axis=1)
-            v = layers.concat([select_v, v], axis=1)
-            layers.assign(k, cache["k"])
-            layers.assign(v, cache["v"])
-        else:
-            #k = select_k
-            #v = select_v
-            tmp_k = layers.concat([select_k, k[:, :1]], axis=1)
-            tmp_v = layers.concat([select_v, v[:, :1]], axis=1)
-            layers.assign(tmp_k, cache["k"])
-            layers.assign(tmp_v, cache["v"])
-            k = layers.concat([select_k, k], axis=1)
-            v = layers.concat([select_v, v], axis=1)
-
-    q = __split_heads(q, n_head)
-    k = __split_heads(k, n_head)
-    v = __split_heads(v, n_head)
-
-    ctx_multiheads = scaled_dot_product_attention(q, k, v, attn_bias, d_key, dropout_rate)
-
-    out = __combine_heads(ctx_multiheads)
-
-    # Project back to the model size.
-    proj_out = layers.fc(
-        input=out,
-        size=d_model,
-        num_flatten_dims=2,
-        param_attr=fluid.ParamAttr(name=name + "_output_fc.w_0", initializer=param_initializer),
-        bias_attr=name + "_output_fc.b_0")
-    return proj_out
-
-
-def positionwise_feed_forward(x, d_inner_hid, d_hid, dropout_rate, hidden_act, param_initializer=None, name="ffn"):
-    """
-    Position-wise Feed-Forward Networks.
-    This module consists of two linear transformations with a ReLU activation
-    in between, which is applied to each position separately and identically.
-    """
-    hidden = layers.fc(
-        input=x,
-        size=d_inner_hid,
-        num_flatten_dims=2,
-        act=hidden_act,
-        param_attr=fluid.ParamAttr(name=name + "_fc_0.w_0", initializer=param_initializer),
-        bias_attr=name + "_fc_0.b_0")
-    if dropout_rate:
-        hidden = layers.dropout(
-            hidden, dropout_prob=dropout_rate, dropout_implementation="upscale_in_train", is_test=False)
-    out = layers.fc(
-        input=hidden,
-        size=d_hid,
-        num_flatten_dims=2,
-        param_attr=fluid.ParamAttr(name=name + "_fc_1.w_0", initializer=param_initializer),
-        bias_attr=name + "_fc_1.b_0")
-    return out
-
-
-def pre_post_process_layer(prev_out, out, process_cmd, dropout_rate=0., epsilon=1e-5, name=""):
-    """
-    Add residual connection, layer normalization and droput to the out tensor
-    optionally according to the value of process_cmd.
-    This will be used before or after multi-head attention and position-wise
-    feed-forward networks.
-    """
-    for cmd in process_cmd:
-        if cmd == "a":  # add residual connection
-            out = out + prev_out if prev_out else out
-        elif cmd == "n":  # add layer normalization
-            out = layers.layer_norm(
-                out,
-                begin_norm_axis=len(out.shape) - 1,
-                param_attr=fluid.ParamAttr(name=name + "_layer_norm_scale", initializer=fluid.initializer.Constant(1.)),
-                bias_attr=fluid.ParamAttr(name=name + "_layer_norm_bias", initializer=fluid.initializer.Constant(0.)),
-                epsilon=epsilon)
-        elif cmd == "d":  # add dropout
-            if dropout_rate:
-                out = layers.dropout(
-                    out, dropout_prob=dropout_rate, dropout_implementation="upscale_in_train", is_test=False)
-    return out
-
-
-pre_process_layer = partial(pre_post_process_layer, None)
-post_process_layer = pre_post_process_layer
-
-
-def encoder_layer(input,
-                  attn_bias,
-                  n_head,
-                  d_key,
-                  d_value,
-                  d_model,
-                  d_inner_hid,
-                  prepostprocess_dropout,
-                  attention_dropout,
-                  relu_dropout,
-                  hidden_act,
-                  preprocess_cmd="n",
-                  postprocess_cmd="da",
-                  param_initializer=None,
-                  name="",
-                  epsilon=1e-5,
-                  cache=None,
-                  gather_idx=None,
-                  store=False):
-    """
-    The encoder layers that can be stacked to form a deep encoder.
-    This module consits of a multi-head (self) attention followed by
-    position-wise feed-forward networks and both the two components companied
-    with the pre_process_layer / post_process_layer to add residual connection,
-    layer normalization and droput.
-    """
-    attn_output = multi_head_attention(
-        pre_process_layer(input, preprocess_cmd, prepostprocess_dropout, epsilon=epsilon, name=name + "_pre_att"),
-        None,
-        None,
-        attn_bias,
-        d_key,
-        d_value,
-        d_model,
-        n_head,
-        attention_dropout,
-        param_initializer=param_initializer,
-        name=name + "_multi_head_att",
-        cache=cache,
-        gather_idx=gather_idx,
-        store=store)
-    attn_output = post_process_layer(
-        input, attn_output, postprocess_cmd, prepostprocess_dropout, name=name + "_post_att", epsilon=epsilon)
-    ffd_output = positionwise_feed_forward(
-        pre_process_layer(attn_output, preprocess_cmd, prepostprocess_dropout, epsilon=epsilon, name=name + "_pre_ffn"),
-        d_inner_hid,
-        d_model,
-        relu_dropout,
-        hidden_act,
-        param_initializer=param_initializer,
-        name=name + "_ffn")
-    ffd_output = post_process_layer(
-        attn_output, ffd_output, postprocess_cmd, prepostprocess_dropout, name=name + "_post_ffn", epsilon=epsilon)
-    return ffd_output, [attn_output, ffd_output]
-
-
-def encoder(enc_input,
-            attn_bias,
-            n_layer,
-            n_head,
-            d_key,
-            d_value,
-            d_model,
-            d_inner_hid,
-            prepostprocess_dropout,
-            attention_dropout,
-            relu_dropout,
-            hidden_act,
-            preprocess_cmd="n",
-            postprocess_cmd="da",
-            param_initializer=None,
-            name="",
-            epsilon=1e-5,
-            n_layer_per_block=1,
-            param_share="normal",
-            caches=None,
-            gather_idx=None,
-            store=False):
-    """
-    The encoder is composed of a stack of identical layers returned by calling
-    encoder_layer.
-    """
-    checkpoints = []
-    names = []
-    if param_share == "inner_share":
-        for _ in range(n_layer // n_layer_per_block):
-            for i in range(n_layer_per_block):
-                names.append(name + "_layer_" + str(i))
-    else:
-        for i in range(n_layer // n_layer_per_block):
-            for _ in range(n_layer_per_block):
-                names.append(name + "_layer_" + str(i))
-
-    for i in range(n_layer):
-        enc_output, cps = encoder_layer(
-            enc_input,
-            attn_bias,
-            n_head,
-            d_key,
-            d_value,
-            d_model,
-            d_inner_hid,
-            prepostprocess_dropout,
-            attention_dropout,
-            relu_dropout,
-            hidden_act,
-            preprocess_cmd,
-            postprocess_cmd,
-            param_initializer=param_initializer,
-            epsilon=epsilon,
-            name=names[i],
-            cache=caches[i] if caches is not None else None,
-            gather_idx=gather_idx,
-            store=store)
-        checkpoints.extend(cps)
-        enc_input = enc_output
-    enc_output = pre_process_layer(
-        enc_output, preprocess_cmd, prepostprocess_dropout, name="post_encoder", epsilon=epsilon)
-
-    return enc_output, checkpoints

modules/text/text_generation/plato2_en_base/models/unified_transformer.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Unified Transformer model."""
-
-import numpy as np
-import paddle.fluid as fluid
-import paddle.fluid.layers as layers
-
-from . import register_model
-from .model_base import Model
-from .transformer_block import encoder, pre_process_layer
-from plato2_en_base.utils.args import str2bool
-from plato2_en_base.utils import repeat_array_or_tensor, slice_array_or_tensor
-from .generator import Generator
-
-
-@register_model("UnifiedTransformer")
-class UnifiedTransformer(Model):
-    """Unified Transformer"""
-
-    @classmethod
-    def add_cmdline_args(cls, parser):
-        """Add cmdline argurments."""
-        group = Model.add_cmdline_args(parser)
-        group.add_argument("--max_seq_len", type=int, default=256)
-        group.add_argument("--weight_sharing", type=str2bool, default=True)
-        group.add_argument("--mem_efficient", type=str2bool, default=False)
-
-        Generator.add_cmdline_args(parser)
-        return group
-
-    def __init__(self, args, place):
-        self.max_seq_len = args.max_seq_len
-
-        self.emb_size = args.emb_size or args.hidden_size
-        self.hidden_size = args.hidden_size
-
-        self.n_layer = args.num_hidden_layers
-        self.n_head = args.num_attention_heads
-        self.d_key = args.get("key_size", self.hidden_size // self.n_head)
-        self.d_value = args.get("value_size", self.hidden_size // self.n_head)
-        self.inner_hidden_size = args.get("inner_hidden_size", self.hidden_size * 4)
-
-        self.vocab_size = args.vocab_size
-        self.max_position_seq_len = args.max_position_embeddings
-        self.type_size = args.type_vocab_size
-        self.token_emb_name = "word_embedding"
-        self.type_emb_name = "sent_embedding"
-        self.pos_emb_name = "pos_embedding"
-
-        self.epsilon = args.epsilon or 1e-5
-        self.n_layer_per_block = args.n_layer_per_block or 1
-        self.pre_encoder_cmd = args.get("pre_encoder_cmd", "nd")
-        self.preprocess_cmd = args.get("preprocess_cmd", "")
-        self.postprocess_cmd = args.get("postprocess_cmd", "dan")
-        self.post_cls_cmd = args.get("post_cls_cmd", "n")
-        self.cls_bias = args.get("cls_bias", True)
-        if self.hidden_size != self.emb_size:
-            self.emb_mapping_in = True
-        else:
-            self.emb_mapping_in = args.get("emb_mapping_in", False)
-
-        self.hidden_act = args.hidden_act
-        self.prepostprocess_dropout = args.hidden_dropout_prob
-        self.attention_dropout = args.attention_probs_dropout_prob
-        self.weight_sharing = args.weight_sharing
-
-        self.mem_efficient = args.mem_efficient
-
-        self.dtype = "float32"
-
-        # Initialize all weigths by truncated normal initializer, and all biases
-        # will be initialized by constant zero by default.
-        self.param_initializer = fluid.initializer.TruncatedNormal(scale=args.initializer_range)
-
-        # task-related
-        self.generator = Generator(args)
-        self.do_generation = args.do_generation
-
-        super(UnifiedTransformer, self).__init__(args, place)
-
-    def _gen_input(self, token_ids, type_ids, pos_ids, input_mask, aux_emb=None):
-        token_emb_out = layers.embedding(
-            input=token_ids,
-            size=[self.vocab_size, self.emb_size],
-            dtype=self.dtype,
-            param_attr=fluid.ParamAttr(name=self.token_emb_name, initializer=self.param_initializer))
-        type_emb_out = layers.embedding(
-            input=type_ids,
-            size=[self.type_size, self.emb_size],
-            dtype=self.dtype,
-            param_attr=fluid.ParamAttr(name=self.type_emb_name, initializer=self.param_initializer))
-        pos_emb_out = layers.embedding(
-            input=pos_ids,
-            size=[self.max_position_seq_len, self.emb_size],
-            dtype=self.dtype,
-            param_attr=fluid.ParamAttr(name=self.pos_emb_name, initializer=self.param_initializer))
-        emb_out = token_emb_out + type_emb_out + pos_emb_out
-
-        # auxiliary memory embeddings
-        if aux_emb is not None:
-            emb_out = layers.concat([aux_emb, emb_out], axis=1)
-
-        # post process of embedding
-        emb_out = pre_process_layer(
-            emb_out, self.pre_encoder_cmd, self.prepostprocess_dropout, name="pre_encoder", epsilon=self.epsilon)
-        if self.emb_mapping_in:
-            emb_out = layers.fc(
-                input=emb_out,
-                num_flatten_dims=2,
-                size=self.hidden_size,
-                param_attr=fluid.ParamAttr(name="emb_hidden_mapping", initializer=self.param_initializer),
-                bias_attr="emb_hidden_mapping_bias")
-
-        # generate n-head self-attention mask
-        self_attn_mask = input_mask
-        self_attn_mask = layers.scale(x=self_attn_mask, scale=1e4, bias=-1.0, bias_after_scale=False)
-        n_head_self_attn_mask = layers.stack(x=[self_attn_mask] * self.n_head, axis=1)
-        n_head_self_attn_mask.stop_gradient = True
-
-        return emb_out, n_head_self_attn_mask
-
-    def _get_pooled_output(self, enc_out, pos):
-        enc_out = layers.reshape(x=enc_out, shape=[-1, self.hidden_size])
-        pos = layers.cast(x=pos, dtype="int32")
-        feat = layers.gather(input=enc_out, index=pos)
-
-        pooled_out = layers.fc(
-            input=feat,
-            size=self.hidden_size,
-            act="tanh",
-            param_attr=fluid.ParamAttr(name="pooled_fc.w_0", initializer=self.param_initializer),
-            bias_attr="pooled_fc.b_0")
-        return pooled_out
-
-    def _generation_network(self, token_ids, type_ids, pos_ids, generation_mask, aux_emb=None, gather_idx=None):
-        emb_out, n_head_self_attn_mask = self._gen_input(token_ids, type_ids, pos_ids, generation_mask, aux_emb=aux_emb)
-        return self._encode(emb_out, n_head_self_attn_mask, self.generation_caches, gather_idx=gather_idx)
-
-    def _encode(self, emb_out, n_head_self_attn_mask, caches=None, gather_idx=None):
-        return encoder(
-            enc_input=emb_out,
-            attn_bias=n_head_self_attn_mask,
-            n_layer=self.n_layer,
-            n_head=self.n_head,
-            d_key=self.d_key,
-            d_value=self.d_value,
-            d_model=self.hidden_size,
-            d_inner_hid=self.inner_hidden_size,
-            prepostprocess_dropout=self.prepostprocess_dropout,
-            attention_dropout=self.attention_dropout,
-            relu_dropout=0,
-            hidden_act=self.hidden_act,
-            preprocess_cmd=self.preprocess_cmd,
-            postprocess_cmd=self.postprocess_cmd,
-            param_initializer=self.param_initializer,
-            epsilon=self.epsilon,
-            n_layer_per_block=self.n_layer_per_block,
-            name="encoder",
-            caches=caches,
-            gather_idx=gather_idx,
-            store=caches is not None)
-
-    def _gumbel_softmax(self, logits, tau=0.67, eps=1e-10):
-        u = layers.uniform_random_batch_size_like(logits, shape=[-1, self.latent_type_size], min=0.0, max=1.0)
-        u.stop_gradient = True
-        gumbel = 0.0 - layers.log(eps - layers.log(u + eps))
-        y = logits + gumbel
-        return layers.softmax(y / tau)
-
-    def _get_feed_dict(self, is_infer=False):
-        """
-        Get the feed list of the model.
-
-        Args:
-            is_infer(bool): True if running inference.
-
-        Returns:
-            list(Variable): The feed list.
-            list(str): The name of each Variable in feed list.
-        """
-        feed_dict = {}
-        feed_dict["token_ids"] = layers.data(name="token_ids", shape=[-1, self.max_seq_len, 1], dtype="int64")
-        feed_dict["type_ids"] = layers.data(name="type_ids", shape=[-1, self.max_seq_len, 1], dtype="int64")
-        feed_dict["pos_ids"] = layers.data(name="pos_ids", shape=[-1, self.max_seq_len, 1], dtype="int64")
-
-        feed_dict["generation_mask"] = layers.data(
-            name="generation_mask", shape=[-1, self.max_seq_len, self.max_seq_len], dtype=self.dtype)
-
-        if is_infer:
-            feed_dict["tgt_ids"] = layers.data(
-                name="tgt_ids", shape=[-1, self.max_seq_len, 1], dtype="int64", lod_level=2)
-            feed_dict["tgt_pos"] = layers.data(
-                name="tgt_pos", shape=[-1, self.max_seq_len, 1], dtype="int64", lod_level=2)
-            feed_dict["init_score"] = layers.data(name="init_score", shape=[-1, 1], dtype="float32", lod_level=1)
-            feed_dict["parent_idx"] = layers.data(name="parent_idx", shape=[-1], dtype="int64")
-
-            feed_dict["tgt_generation_mask"] = layers.data(
-                name="tgt_generation_mask", shape=[-1, 1, self.max_seq_len], dtype="float32")
-        else:
-            feed_dict["tgt_label"] = layers.data(name="tgt_label", shape=[-1, 1], dtype="int64")
-            feed_dict["tgt_pos"] = layers.data(name="tgt_pos", shape=[-1, 1], dtype="int64")
-
-        feed_dict["data_id"] = layers.data(name="data_id", shape=[-1, 1], dtype="int64")
-        return feed_dict
-
-    def forward(self, inputs, is_infer=False):
-        """
-        Run model main forward.
-        """
-        outputs = {}
-        if is_infer:
-            self.generation_caches = [{
-                "k":
-                layers.fill_constant_batch_size_like(
-                    input=inputs["token_ids"], shape=[-1, 0, self.d_key * self.n_head], dtype=self.dtype, value=0),
-                "v":
-                layers.fill_constant_batch_size_like(
-                    input=inputs["token_ids"], shape=[-1, 0, self.d_value * self.n_head], dtype=self.dtype, value=0),
-            } for i in range(self.n_layer)]
-        else:
-            self.generation_caches = None
-
-        outputs["enc_out"], generation_checkpoints = self._generation_network(
-            token_ids=inputs["token_ids"],
-            type_ids=inputs["type_ids"],
-            pos_ids=inputs["pos_ids"],
-            generation_mask=inputs["generation_mask"],
-            gather_idx=inputs.get("parent_idx", None))
-
-        if not is_infer:
-            outputs["checkpoints"] = generation_checkpoints
-        return outputs
-
-    def _calc_logits(self, enc_out, checkpoints=None, seq_pos=None):
-        """Get the logits of generation."""
-        enc_out = layers.reshape(x=enc_out, shape=[-1, self.hidden_size])
-        if seq_pos is not None:
-            seq_pos = layers.cast(x=seq_pos, dtype="int32")
-            seq_feat = layers.gather(input=enc_out, index=seq_pos)
-        else:
-            seq_feat = enc_out
-
-        seq_trans_feat = layers.fc(
-            input=seq_feat,
-            size=self.emb_size,
-            act=self.hidden_act,
-            param_attr=fluid.ParamAttr(name="mask_lm_trans_fc.w_0", initializer=self.param_initializer),
-            bias_attr=fluid.ParamAttr(name="mask_lm_trans_fc.b_0"))
-
-        seq_trans_feat = pre_process_layer(seq_trans_feat, self.post_cls_cmd, name="mask_lm_trans")
-
-        if checkpoints is not None:
-            checkpoints.append(seq_trans_feat)
-
-        if self.weight_sharing:
-            fc_out = layers.matmul(
-                x=seq_trans_feat,
-                y=fluid.default_main_program().global_block().var(self.token_emb_name),
-                transpose_y=True)
-            if self.cls_bias:
-                fc_out += layers.create_parameter(
-                    shape=[self.vocab_size],
-                    dtype=self.dtype,
-                    attr=fluid.ParamAttr(name="mask_lm_out_fc.b_0"),
-                    is_bias=True)
-        else:
-            seq_out_bias_attr = fluid.ParamAttr(name="mask_lm_out_fc.b_0") if self.cls_bias else False
-            fc_out = layers.fc(
-                input=seq_trans_feat,
-                size=self.vocab_size,
-                param_attr=fluid.ParamAttr(name="mask_lm_out_fc.w_0", initializer=self.param_initializer),
-                bias_attr=seq_out_bias_attr)
-        return fc_out
-
-    def _get_metrics(self, inputs, outputs):
-        metrics = {}
-
-        fc_out = self._calc_logits(outputs["enc_out"], outputs["checkpoints"], inputs["tgt_pos"])
-        tgt_lm_loss = layers.softmax_with_cross_entropy(logits=fc_out, label=inputs["tgt_label"])
-        mean_tgt_lm_loss = layers.mean(tgt_lm_loss)
-        loss = mean_tgt_lm_loss
-        metrics["token_lm_loss"] = mean_tgt_lm_loss
-
-        metrics["loss"] = loss
-        return metrics
-
-    def _get_statistics(self, inputs, outputs):
-        statistics = {}
-        if "tgt_label" in inputs:
-            statistics["tokens_num"] = layers.reduce_sum(
-                layers.fill_constant_batch_size_like(input=inputs["tgt_label"], value=1.0, shape=[-1], dtype="int64"))
-        statistics["batch_size"] = layers.reduce_sum(
-            layers.fill_constant_batch_size_like(input=inputs["token_ids"], value=1.0, shape=[-1], dtype="int64"))
-        return statistics
-
-    def get_metrics_and_statistics(self, inputs, outputs):
-        """
-        Get metrics and statistics.
-        """
-        metrics = self._get_metrics(inputs, outputs)
-        statistics = self._get_statistics(inputs, outputs)
-        return metrics, statistics
-
-    def infer(self, inputs, outputs):
-        """
-        Run model inference.
-        """
-        if self.do_generation:
-            return self.generator.inference(self, inputs, outputs)
-        else:
-            raise NotImplementedError
-
-    def _run_generation(self, inputs):
-        """
-        Run generation.
-        """
-        batch_size = len(inputs["data_id"])
-        inputs["parent_idx"] = np.array(range(batch_size), dtype="int64")
-        outputs = self._execute(
-            self.infer_program, self._get_feed(inputs, is_infer=True), self.infer_fetch_dict, return_numpy=False)
-
-        predictions = []
-        data_id_list = np.array(outputs["data_id"]).reshape(-1).tolist()
-        token_ids_list = np.array(outputs["token_ids"]).squeeze(2).tolist()
-        seq_ids = outputs["finished_ids"]
-        seq_ids_np = np.array(outputs["finished_ids"])
-        seq_scores_np = np.array(outputs["finished_scores"])
-        for i, (data_id, token_ids) in enumerate(zip(data_id_list, token_ids_list)):
-            start = seq_ids.lod()[0][i]
-            end = seq_ids.lod()[0][i + 1]
-            for j in range(start, end):
-                sub_start = seq_ids.lod()[1][j]
-                sub_end = seq_ids.lod()[1][j + 1]
-                info = {}
-                info["data_id"] = data_id
-                info["decode_score"] = float(seq_scores_np[sub_end - 1])
-                info["context_token_ids"] = token_ids
-                info["response_token_ids"] = seq_ids_np[sub_start:sub_end].tolist()
-                predictions.append(info)
-        return predictions
-
-    def infer_step(self, inputs):
-        """
-        Run one inference step.
-        """
-        if self.do_generation:
-            if self.generator.num_samples:
-                inputs = {
-                    name: repeat_array_or_tensor(array_or_tensor, self.place, self.generator.num_samples)
-                    for name, array_or_tensor in inputs.items()
-                }
-
-            if self.mem_efficient:
-                predictions = []
-                for idx in range(0, len(inputs["data_id"]), self.batch_size):
-                    part_inputs = {
-                        name: slice_array_or_tensor(array_or_tensor, self.place, idx, idx + self.batch_size)
-                        for name, array_or_tensor in inputs.items()
-                    }
-                    part_outputs = self._run_generation(part_inputs)
-                    predictions.extend(part_outputs)
-            else:
-                predictions = self._run_generation(inputs)
-            return predictions
-        else:
-            return self._execute(self.infer_program, self._get_feed(inputs, is_infer=True), self.infer_fetch_dict)

modules/text/text_generation/plato2_en_base/module.py

@@ -12,83 +12,102 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-import ast
-import os
-import json
-import sys
 import argparse
 import contextlib
+import os
+import sys
 from collections import namedtuple
 
-import paddle.fluid as fluid
+import paddle
+import paddle.nn as nn
+
 import paddlehub as hub
+from .model import Plato2InferModel
+from .readers.nsp_reader import NSPReader
+from .readers.plato_reader import PlatoReader
+from .utils import gen_inputs
+from .utils.args import parse_args
+from .utils.args import str2bool
+from paddlehub.module.module import moduleinfo
 from paddlehub.module.module import runnable
+from paddlehub.module.module import serving
 from paddlehub.module.nlp_module import DataFormatError
-from paddlehub.common.logger import logger
-from paddlehub.module.module import moduleinfo, serving
-
-import plato2_en_base.models as plato_models
-from plato2_en_base.tasks.dialog_generation import DialogGeneration
-from plato2_en_base.utils import check_cuda, Timer
-from plato2_en_base.utils.args import parse_args
 
 
 @moduleinfo(
     name="plato2_en_base",
-    version="1.0.0",
+    version="1.1.0",
     summary=
     "A novel pre-training model for dialogue generation, incorporated with latent discrete variables for one-to-many relationship modeling.",
     author="baidu-nlp",
     author_email="",
     type="nlp/text_generation",
 )
-class Plato(hub.NLPPredictionModule):
-    def _initialize(self):
+class Plato2(nn.Layer, hub.NLPPredictionModule):
+
+    def __init__(self):
         """
         initialize with the necessary elements
         """
-        if "CUDA_VISIBLE_DEVICES" not in os.environ:
-            raise RuntimeError("The module only support GPU. Please set the environment variable CUDA_VISIBLE_DEVICES.")
-
+        super(Plato2, self).__init__()
         args = self.setup_args()
-        self.task = DialogGeneration(args)
-        self.model = plato_models.create_model(args, fluid.CUDAPlace(0))
+
+        if args.num_layers == 24:
+            n_head = 16
+            hidden_size = 1024
+        elif args.num_layers == 32:
+            n_head = 32
+            hidden_size = 2048
+        else:
+            raise ValueError('The pre-trained model only support 24 or 32 layers, '
+                             'but received num_layers=%d.' % args.num_layers)
+
+        self.plato_reader = PlatoReader(args)
+        nsp_reader = NSPReader(args)
+        self.model = Plato2InferModel(nsp_reader, args.num_layers, n_head, hidden_size)
+        state_dict = paddle.load(args.init_from_ckpt)
+        self.model.set_state_dict(state_dict)
+        self.model.eval()
         self.Example = namedtuple("Example", ["src", "data_id"])
+        self.latent_type_size = args.latent_type_size
         self._interactive_mode = False
 
     def setup_args(self):
         """
         Setup arguments.
         """
-        assets_path = os.path.join(self.directory, "assets")
-        vocab_path = os.path.join(assets_path, "vocab.txt")
-        init_pretraining_params = os.path.join(assets_path, "24L", "Plato")
-        spm_model_file = os.path.join(assets_path, "spm.model")
-        nsp_inference_model_path = os.path.join(assets_path, "24L", "NSP")
-        config_path = os.path.join(assets_path, "24L.json")
+        ckpt_path = os.path.join(self.directory, 'assets', '24L.pdparams')
+        vocab_path = os.path.join(self.directory, 'assets', 'vocab.txt')
+        spm_model_file = os.path.join(self.directory, 'assets', 'spm.model')
 
         # ArgumentParser.parse_args use argv[1:], it will drop the first one arg, so the first one in sys.argv should be ""
         sys.argv = [
-            "", "--model", "Plato", "--vocab_path",
-            "%s" % vocab_path, "--do_lower_case", "False", "--init_pretraining_params",
-            "%s" % init_pretraining_params, "--spm_model_file",
-            "%s" % spm_model_file, "--nsp_inference_model_path",
-            "%s" % nsp_inference_model_path, "--ranking_score", "nsp_score", "--do_generation", "True", "--batch_size",
-            "1", "--config_path",
-            "%s" % config_path
+            "--empty",
+            "--spm_model_file",
+            "%s" % spm_model_file,
+            "--vocab_path",
+            "%s" % vocab_path,
         ]
 
         parser = argparse.ArgumentParser()
-        plato_models.add_cmdline_args(parser)
-        DialogGeneration.add_cmdline_args(parser)
-        args = parse_args(parser)
+        group = parser.add_argument_group("Model")
+        group.add_argument("--init_from_ckpt", type=str, default=ckpt_path)
+        group.add_argument("--vocab_size", type=int, default=8001)
+        group.add_argument("--latent_type_size", type=int, default=20)
+        group.add_argument("--num_layers", type=int, default=24)
 
-        args.load(args.config_path, "Model")
-        args.run_infer = True  # only build infer program
+        group = parser.add_argument_group("Task")
+        group.add_argument("--is_cn", type=str2bool, default=False)
+
+        NSPReader.add_cmdline_args(parser)
+
+        args = parse_args(parser)
+        args.batch_size *= args.latent_type_size
 
         return args
 
     @serving
+    @paddle.no_grad()
     def generate(self, texts):
         """
         Get the robot responses of the input texts.
@@ -113,10 +132,12 @@ class Plato(hub.NLPPredictionModule):
 
         bot_responses = []
         for i, text in enumerate(texts):
-            example = self.Example(src=text.replace("\t", " [SEP] "), data_id=i)
-            record = self.task.reader._convert_example_to_record(example, is_infer=True)
-            data = self.task.reader._pad_batch_records([record], is_infer=True)
-            pred = self.task.infer_step(self.model, data)[0]  # batch_size is 1
+            example = self.Example(src=text.replace("\t", " [SEP] "), data_id=0)
+            record = self.plato_reader._convert_example_to_record(example, is_infer=True)
+            data = self.plato_reader._pad_batch_records([record], is_infer=True)
+            inputs = gen_inputs(data, self.latent_type_size)
+            inputs['tgt_ids'] = inputs['tgt_ids'].astype('int64')
+            pred = self.model(inputs)[0]  # batch_size is 1
             bot_response = pred["response"]  # ignore data_id and score
             bot_responses.append(bot_response)
 
@@ -144,11 +165,10 @@ class Plato(hub.NLPPredictionModule):
         """
         Run as a command
         """
-        self.parser = argparse.ArgumentParser(
-            description='Run the %s module.' % self.name,
-            prog='hub run %s' % self.name,
-            usage='%(prog)s',
-            add_help=True)
+        self.parser = argparse.ArgumentParser(description='Run the %s module.' % self.name,
+                                              prog='hub run %s' % self.name,
+                                              usage='%(prog)s',
+                                              add_help=True)
 
         self.arg_input_group = self.parser.add_argument_group(title="Input options", description="Input data. Required")
         self.arg_config_group = self.parser.add_argument_group(
@@ -167,14 +187,3 @@ class Plato(hub.NLPPredictionModule):
         results = self.generate(texts=input_data)
 
         return results
-
-
-if __name__ == "__main__":
-    module = Plato()
-    for result in module.generate(["Hello", "Hello\thi, nice to meet you, my name is tom\tso your name is tom?"]):
-        print(result)
-    with module.interactive_mode(max_turn=3):
-        while True:
-            human_utterance = input()
-            robot_utterance = module.generate(human_utterance)
-            print("Robot: %s" % robot_utterance[0])

modules/text/text_generation/plato2_en_base/readers/dialog_reader.py

@@ -17,16 +17,13 @@ import csv
 from collections import namedtuple
 from contextlib import contextmanager
 import gzip
-import os
 
 import numpy as np
-import paddle.fluid as fluid
-from paddle.fluid.incubate.fleet.collective import fleet
 
-from plato2_en_base.utils import pad_batch_data
-from plato2_en_base.utils.args import str2bool
-from plato2_en_base.utils.masking import mask
-import plato2_en_base.utils.tokenization as tokenization
+from ..utils import pad_batch_data
+from ..utils.args import str2bool
+from ..utils.masking import mask
+from ..utils import tokenization
 
 
 class DialogReader(object):
@@ -38,9 +35,17 @@ class DialogReader(object):
         group = parser.add_argument_group("Reader")
         group.add_argument("--max_src_len", type=int, default=128)
         group.add_argument("--max_tgt_len", type=int, default=128)
-        group.add_argument("--truncate_first_turn", type=str2bool, default=False)
-        group.add_argument("--file_format", type=str, default="file", choices=["file", "filelist"])
-        group.add_argument("--data_format", type=str, default="raw", choices=["raw", "tokenized", "numerical"])
+        group.add_argument("--truncate_first_turn",
+                           type=str2bool,
+                           default=False)
+        group.add_argument("--file_format",
+                           type=str,
+                           default="file",
+                           choices=["file", "filelist"])
+        group.add_argument("--data_format",
+                           type=str,
+                           default="raw",
+                           choices=["raw", "tokenized", "numerical"])
         group.add_argument("--in_tokens", type=str2bool, default=False)
         group.add_argument("--batch_size", type=int, default=16)
         group.add_argument("--continuous_position", type=str2bool, default=True)
@@ -48,7 +53,9 @@ class DialogReader(object):
         group.add_argument("--sort_pool_size", type=int, default=2**16)
 
         group = parser.add_argument_group("Tokenizer")
-        group.add_argument("--tokenizer", type=str, default="SentencePieceTokenizer")
+        group.add_argument("--tokenizer",
+                           type=str,
+                           default="SentencePieceTokenizer")
         args, _ = parser.parse_known_args()
         tokenizer_cls = getattr(tokenization, args.tokenizer)
         tokenizer_cls.add_cmdline_args(parser)
@@ -89,7 +96,9 @@ class DialogReader(object):
         self.fields += ["tgt_start_idx", "data_id"]
         self.sort_key = lambda record: [len(record.token_ids)]
 
-        self.Record = namedtuple("Record", self.fields, defaults=(None, ) * len(self.fields))
+        self.Record = namedtuple("Record",
+                                 self.fields,
+                                 defaults=(None, ) * len(self.fields))
 
         self.features = {}
         return
@@ -113,7 +122,9 @@ class DialogReader(object):
             else:
                 s_tokens = self.tokenizer.tokenize(s)
 
-            s_token_ids = self.tokenizer.convert_tokens_to_ids(s_tokens) + [self.eos_id]
+            s_token_ids = self.tokenizer.convert_tokens_to_ids(s_tokens) + [
+                self.eos_id
+            ]
             s_token_ids_list.append(s_token_ids)
 
         # trim src
@@ -123,9 +134,12 @@ class DialogReader(object):
             total_token_num += len(s_token_ids_list[idx])
             if total_token_num > self.max_src_len:
                 if self.truncate_first_turn and idx == 0:
-                    truncated_ids = s_token_ids_list[idx][:self.max_src_len - total_token_num]
+                    truncated_ids = s_token_ids_list[idx][:self.max_src_len -
+                                                          total_token_num]
                     if len(truncated_ids) > 1:
-                        s_token_ids_list[idx] = truncated_ids[:-1] + [self.eos_id]
+                        s_token_ids_list[idx] = truncated_ids[:-1] + [
+                            self.eos_id
+                        ]
                         idx -= 1
                 break
             idx -= 1
@@ -180,7 +194,11 @@ class DialogReader(object):
                 tgt_pos_ids = list(range(len(tgt_token_ids)))
             pos_ids = list(range(len(token_ids)))
 
-        field_values = {"token_ids": src_token_ids, "type_ids": src_type_ids, "pos_ids": src_pos_ids}
+        field_values = {
+            "token_ids": src_token_ids,
+            "type_ids": src_type_ids,
+            "pos_ids": src_pos_ids
+        }
         field_values["tgt_start_idx"] = tgt_start_idx
         field_values["data_id"] = example.data_id
 
@@ -204,7 +222,8 @@ class DialogReader(object):
 
     def _read_numerical_file(self, fp, delimiter=";"):
         for i, line in enumerate(fp):
-            cols = tokenization.convert_to_unicode(line).strip().split(delimiter)
+            cols = tokenization.convert_to_unicode(line).strip().split(
+                delimiter)
             cols = list(map(lambda x: list(map(int, x.split(" "))), cols))
             if len(cols) > self.num_numerical_fields:
                 cols = cols[:self.num_numerical_fields]
@@ -213,6 +232,7 @@ class DialogReader(object):
             yield record
 
     def _read_file(self, input_file, phase, is_infer):
+
         def __wrapper__():
             with open_file(input_file) as fp:
                 if self.data_format == "numerical":
@@ -237,13 +257,18 @@ class DialogReader(object):
                 if phase == "train":
                     self.current_file_index = file_index
                     self.current_file = input_file
-                file_reader = self._read_file(input_file.strip(), phase, is_infer)
+                file_reader = self._read_file(input_file.strip(), phase,
+                                              is_infer)
                 for record in file_reader():
                     yield record
 
         return __wrapper__
 
-    def _batch_reader(self, reader, phase=None, is_infer=False, sort_pool_size=2**16):
+    def _batch_reader(self,
+                      reader,
+                      phase=None,
+                      is_infer=False,
+                      sort_pool_size=2**16):
         """Construct a batch reader."""
 
         def update_max_lens(max_lens, record):
@@ -251,7 +276,10 @@ class DialogReader(object):
             if max_lens is None:
                 return self.sort_key(record)
             else:
-                return [max(max_len, l) for max_len, l in zip(max_lens, self.sort_key(record))]
+                return [
+                    max(max_len, l)
+                    for max_len, l in zip(max_lens, self.sort_key(record))
+                ]
 
         def get_batch(reader):
             """Generate batches from reader."""
@@ -265,7 +293,8 @@ class DialogReader(object):
                 self.current_example += 1
                 max_lens = update_max_lens(max_lens, record)
                 if self.in_tokens:
-                    to_append = (len(batch) + 1) * sum(max_lens) <= self.batch_size
+                    to_append = (len(batch) +
+                                 1) * sum(max_lens) <= self.batch_size
                 else:
                     to_append = len(batch) < self.batch_size
                 if to_append:
@@ -286,7 +315,8 @@ class DialogReader(object):
                 self.current_example += 1
                 max_lens = update_max_lens(max_lens, record)
                 if self.in_tokens:
-                    to_append = (len(batch) + 1) * sum(max_lens) <= self.batch_size
+                    to_append = (len(batch) +
+                                 1) * sum(max_lens) <= self.batch_size
                 else:
                     to_append = len(batch) < self.batch_size
                 if to_append:
@@ -320,7 +350,12 @@ class DialogReader(object):
 
         return __wrapper__
 
-    def _distributed_batch_reader(self, batch_reader, num_part, part_id, is_test=False):
+    def _distributed_batch_reader(self,
+                                  batch_reader,
+                                  num_part,
+                                  part_id,
+                                  is_test=False):
+
         def __wrapper__():
             batches = []
             for batch in batch_reader():
@@ -351,7 +386,8 @@ class DialogReader(object):
             nonlocal reader
             if reader is None:
                 if self.file_format == "filelist":
-                    reader = self._read_files(input_file, phase, is_infer, not phase.endswith("test"))
+                    reader = self._read_files(input_file, phase, is_infer,
+                                              not phase.endswith("test"))
                 else:
                     if phase == "train":
                         self.total_file = 1
@@ -360,11 +396,18 @@ class DialogReader(object):
                     reader = self._read_file(input_file, phase, is_infer)
 
             batch_reader = self._batch_reader(
-                reader, phase, is_infer, sort_pool_size=self.sort_pool_size if not is_infer else 0)
+                reader,
+                phase,
+                is_infer,
+                sort_pool_size=self.sort_pool_size if not is_infer else 0)
             if phase == "train":
-                batch_reader = self._distributed_batch_reader(batch_reader, num_part, part_id)
+                batch_reader = self._distributed_batch_reader(
+                    batch_reader, num_part, part_id)
             elif phase.startswith("distributed"):
-                batch_reader = self._distributed_batch_reader(batch_reader, num_part, part_id, is_test=True)
+                batch_reader = self._distributed_batch_reader(batch_reader,
+                                                              num_part,
+                                                              part_id,
+                                                              is_test=True)
 
             for epoch_index in range(num_epochs):
                 if phase == "train":
@@ -375,20 +418,28 @@ class DialogReader(object):
 
         return __wrapper__
 
-    def _gen_self_attn_mask(self, batch_token_ids, batch_tgt_start_idx=None, is_unidirectional=True, shift_len=0):
+    def _gen_self_attn_mask(self,
+                            batch_token_ids,
+                            batch_tgt_start_idx=None,
+                            is_unidirectional=True,
+                            shift_len=0):
         max_len = max(map(len, batch_token_ids))
-        input_mask_data = np.zeros((len(batch_token_ids), max_len + shift_len, max_len + shift_len))
+        input_mask_data = np.zeros(
+            (len(batch_token_ids), max_len + shift_len, max_len + shift_len))
         if is_unidirectional:
             for index, mask_data in enumerate(input_mask_data):
-                start = 0 if batch_tgt_start_idx is None else batch_tgt_start_idx[index]
+                start = 0 if batch_tgt_start_idx is None else batch_tgt_start_idx[
+                    index]
                 end = len(batch_token_ids[index])
                 mask_data[:end + shift_len, :start + shift_len] = 1.0
                 # Generate the lower triangular matrix using the slice of matrix
                 b = np.tril(np.ones([end - start, end - start]), 0)
-                mask_data[start + shift_len:end + shift_len, start + shift_len:end + shift_len] = b
+                mask_data[start + shift_len:end + shift_len,
+                          start + shift_len:end + shift_len] = b
         else:
             for index, token_ids in enumerate(batch_token_ids):
-                input_mask_data[index, :len(token_ids) + shift_len, :len(token_ids) + shift_len] = 1.0
+                input_mask_data[index, :len(token_ids) +
+                                shift_len, :len(token_ids) + shift_len] = 1.0
         return input_mask_data.astype("float32")
 
     def _pad_batch_records(self, batch_records, is_infer):
@@ -405,20 +456,24 @@ class DialogReader(object):
         batch["pos_ids"] = pad_batch_data(batch_pos_ids, pad_id=self.pad_id)
 
         batch_tgt_start_idx = [record.tgt_start_idx for record in batch_records]
-        batch["generation_mask"] = self._gen_self_attn_mask(batch_token_ids, batch_tgt_start_idx=batch_tgt_start_idx)
+        batch["generation_mask"] = self._gen_self_attn_mask(
+            batch_token_ids, batch_tgt_start_idx=batch_tgt_start_idx)
 
         if is_infer:
-            tgt_ids = np.array([[[self.bos_id]]] * len(batch_token_ids), dtype="int64")
+            tgt_ids = np.array([[[self.bos_id]]] * len(batch_token_ids),
+                               dtype="int64")
             if self.continuous_position:
                 tgt_pos = np.array(batch_tgt_start_idx, dtype="int64")
             else:
                 tgt_pos = np.zeros_like(batch_tgt_start_idx, dtype="int64")
             tgt_pos = tgt_pos.reshape(-1, 1, 1)
-            batch["init_score"] = np.zeros_like(tgt_ids, dtype="float32").reshape(-1, 1).tolist()
+            batch["init_score"] = np.zeros_like(
+                tgt_ids, dtype="float32").reshape(-1, 1).tolist()
             batch["tgt_ids"] = tgt_ids.tolist()
             batch["tgt_pos"] = tgt_pos.tolist()
 
-            batch["tgt_generation_mask"] = batch["generation_mask"][:, 0:1, :].astype("float32")
+            batch["tgt_generation_mask"] = batch[
+                "generation_mask"][:, 0:1, :].astype("float32")
         else:
             batch["tgt_label"], batch["tgt_pos"] = mask(
                 batch_tokens=batch_token_ids,
@@ -427,7 +482,8 @@ class DialogReader(object):
                 is_unidirectional=True)
 
         batch_data_id = [record.data_id for record in batch_records]
-        batch["data_id"] = np.array(batch_data_id).astype("int64").reshape([-1, 1])
+        batch["data_id"] = np.array(batch_data_id).astype("int64").reshape(
+            [-1, 1])
         return batch
 
 

modules/text/text_generation/plato2_en_base/readers/nsp_reader.py

@@ -17,10 +17,10 @@ from collections import namedtuple
 
 import numpy as np
 
-from plato2_en_base.readers.dialog_reader import DialogReader
-from plato2_en_base.utils import pad_batch_data
-from plato2_en_base.utils.args import str2bool
-from plato2_en_base.utils.masking import mask
+from .dialog_reader import DialogReader
+from ..utils import pad_batch_data
+from ..utils.args import str2bool
+from ..utils.masking import mask
 
 
 class NSPReader(DialogReader):
@@ -30,27 +30,35 @@ class NSPReader(DialogReader):
     def add_cmdline_args(cls, parser):
         """Add cmdline argurments."""
         group = DialogReader.add_cmdline_args(parser)
-        group.add_argument(
-            "--attention_style", type=str, default="bidirectional", choices=["bidirectional", "unidirectional"])
-        group.add_argument("--mix_negative_sample", type=str2bool, default=False)
+        group.add_argument("--attention_style",
+                           type=str,
+                           default="bidirectional",
+                           choices=["bidirectional", "unidirectional"])
+        group.add_argument("--mix_negative_sample",
+                           type=str2bool,
+                           default=False)
         return group
 
     def __init__(self, args):
         super(NSPReader, self).__init__(args)
         self.fields.append("label")
-        self.Record = namedtuple("Record", self.fields, defaults=(None, ) * len(self.fields))
+        self.Record = namedtuple("Record",
+                                 self.fields,
+                                 defaults=(None, ) * len(self.fields))
 
         self.attention_style = args.attention_style
         self.mix_negative_sample = args.mix_negative_sample
         return
 
     def _convert_example_to_record(self, example, is_infer):
-        record = super(NSPReader, self)._convert_example_to_record(example, False)
+        record = super(NSPReader,
+                       self)._convert_example_to_record(example, False)
         if "label" in example._fields:
             record = record._replace(label=int(example.label))
         return record
 
     def _mix_negative_sample(self, reader, neg_pool_size=2**16):
+
         def gen_from_pool(pool):
             num_samples = len(pool)
             if num_samples == 1:
@@ -64,10 +72,16 @@ class NSPReader(DialogReader):
                 idx_i = pool[i].tgt_start_idx
                 idx_j = pool[j].tgt_start_idx
                 field_values = {}
-                field_values["token_ids"] = pool[i].token_ids[:idx_i] + pool[j].token_ids[idx_j:]
-                field_values["type_ids"] = pool[i].type_ids[:idx_i] + pool[j].type_ids[idx_j:]
-                field_values["pos_ids"] = list(range(len(field_values["token_ids"])))
-                neg_record = self.Record(**field_values, tgt_start_idx=idx_i, data_id=-1, label=0)
+                field_values["token_ids"] = pool[i].token_ids[:idx_i] + pool[
+                    j].token_ids[idx_j:]
+                field_values["type_ids"] = pool[i].type_ids[:idx_i] + pool[
+                    j].type_ids[idx_j:]
+                field_values["pos_ids"] = list(
+                    range(len(field_values["token_ids"])))
+                neg_record = self.Record(**field_values,
+                                         tgt_start_idx=idx_i,
+                                         data_id=-1,
+                                         label=0)
                 pool.append(neg_record)
                 assert len(neg_record.token_ids) <= self.max_seq_len
             self.global_rng.shuffle(pool)
@@ -88,11 +102,18 @@ class NSPReader(DialogReader):
 
         return __wrapper__
 
-    def _batch_reader(self, reader, phase=None, is_infer=False, sort_pool_size=2**16):
+    def _batch_reader(self,
+                      reader,
+                      phase=None,
+                      is_infer=False,
+                      sort_pool_size=2**16):
         if self.mix_negative_sample:
             reader = self._mix_negative_sample(reader)
-        return super(NSPReader, self)._batch_reader(
-            reader, phase=phase, is_infer=is_infer, sort_pool_size=sort_pool_size)
+        return super(NSPReader,
+                     self)._batch_reader(reader,
+                                         phase=phase,
+                                         is_infer=is_infer,
+                                         sort_pool_size=sort_pool_size)
 
     def _pad_batch_records(self, batch_records, is_infer):
         """
@@ -106,8 +127,10 @@ class NSPReader(DialogReader):
         batch_label = [record.label for record in batch_records]
 
         if self.attention_style == "unidirectional":
-            batch["token_ids"] = pad_batch_data(batch_token_ids, pad_id=self.pad_id)
-            batch["type_ids"] = pad_batch_data(batch_type_ids, pad_id=self.pad_id)
+            batch["token_ids"] = pad_batch_data(batch_token_ids,
+                                                pad_id=self.pad_id)
+            batch["type_ids"] = pad_batch_data(batch_type_ids,
+                                               pad_id=self.pad_id)
             batch["pos_ids"] = pad_batch_data(batch_pos_ids, pad_id=self.pad_id)
             tgt_label, tgt_pos, label_pos = mask(
                 batch_tokens=batch_token_ids,
@@ -116,7 +139,8 @@ class NSPReader(DialogReader):
                 sent_b_starts=batch_tgt_start_idx,
                 labels=batch_label,
                 is_unidirectional=True)
-            attention_mask = self._gen_self_attn_mask(batch_token_ids, batch_tgt_start_idx)
+            attention_mask = self._gen_self_attn_mask(batch_token_ids,
+                                                      batch_tgt_start_idx)
         else:
             batch_mask_token_ids, tgt_label, tgt_pos, label_pos = mask(
                 batch_tokens=batch_token_ids,
@@ -129,10 +153,13 @@ class NSPReader(DialogReader):
                 is_unidirectional=False)
             if not is_infer:
                 batch_token_ids = batch_mask_token_ids
-            batch["token_ids"] = pad_batch_data(batch_token_ids, pad_id=self.pad_id)
-            batch["type_ids"] = pad_batch_data(batch_type_ids, pad_id=self.pad_id)
+            batch["token_ids"] = pad_batch_data(batch_token_ids,
+                                                pad_id=self.pad_id)
+            batch["type_ids"] = pad_batch_data(batch_type_ids,
+                                               pad_id=self.pad_id)
             batch["pos_ids"] = pad_batch_data(batch_pos_ids, pad_id=self.pad_id)
-            attention_mask = self._gen_self_attn_mask(batch_token_ids, is_unidirectional=False)
+            attention_mask = self._gen_self_attn_mask(batch_token_ids,
+                                                      is_unidirectional=False)
 
         batch["attention_mask"] = attention_mask
         batch["label_pos"] = label_pos
@@ -144,5 +171,6 @@ class NSPReader(DialogReader):
             batch["tgt_pos"] = tgt_pos
 
         batch_data_id = [record.data_id for record in batch_records]
-        batch["data_id"] = np.array(batch_data_id).astype("int64").reshape([-1, 1])
+        batch["data_id"] = np.array(batch_data_id).astype("int64").reshape(
+            [-1, 1])
         return batch

modules/text/text_generation/plato2_en_base/readers/plato_reader.py

@@ -15,9 +15,9 @@
 
 import numpy as np
 
-from plato2_en_base.readers.dialog_reader import DialogReader
-from plato2_en_base.utils import pad_batch_data
-from plato2_en_base.utils.masking import mask
+from .dialog_reader import DialogReader
+from ..utils import pad_batch_data
+from ..utils.masking import mask
 
 
 class PlatoReader(DialogReader):
@@ -47,9 +47,13 @@ class PlatoReader(DialogReader):
         batch["pos_ids"] = pad_batch_data(batch_pos_ids, pad_id=self.pad_id)
 
         batch["generation_mask"] = self._gen_self_attn_mask(
-            batch_token_ids, batch_tgt_start_idx=batch_tgt_start_idx, is_unidirectional=True, shift_len=1)
+            batch_token_ids,
+            batch_tgt_start_idx=batch_tgt_start_idx,
+            is_unidirectional=True,
+            shift_len=1)
         if not is_infer:
-            batch["recognition_mask"] = self._gen_self_attn_mask(batch_token_ids, is_unidirectional=False, shift_len=1)
+            batch["recognition_mask"] = self._gen_self_attn_mask(
+                batch_token_ids, is_unidirectional=False, shift_len=1)
 
         if is_infer:
             tgt_ids = np.array([[[self.bos_id]]] * batch_size, dtype="int64")
@@ -58,20 +62,21 @@ class PlatoReader(DialogReader):
             else:
                 tgt_pos = np.zeros_like(batch_tgt_start_idx, dtype="int64")
             tgt_pos = tgt_pos.reshape(-1, 1, 1)
-            batch["init_score"] = np.zeros_like(tgt_ids, dtype="float32").reshape(-1, 1).tolist()
+            batch["init_score"] = np.zeros_like(
+                tgt_ids, dtype="float32").reshape(-1, 1).tolist()
             batch["tgt_ids"] = tgt_ids.tolist()
             batch["tgt_pos"] = tgt_pos.tolist()
             batch["parent_idx"] = np.array(range(batch_size), dtype="int32")
 
-            batch["tgt_generation_mask"] = batch["generation_mask"][:, 0:1, :].astype("float32")
+            batch["tgt_generation_mask"] = batch[
+                "generation_mask"][:, 0:1, :].astype("float32")
         else:
-            mask_return_list = mask(
-                batch_tokens=batch_token_ids,
-                vocab_size=self.vocab_size,
-                sent_b_starts=batch_tgt_start_idx,
-                is_unidirectional=True,
-                use_latent=True,
-                use_bow=self.use_bow)
+            mask_return_list = mask(batch_tokens=batch_token_ids,
+                                    vocab_size=self.vocab_size,
+                                    sent_b_starts=batch_tgt_start_idx,
+                                    is_unidirectional=True,
+                                    use_latent=True,
+                                    use_bow=self.use_bow)
             batch["tgt_label"] = mask_return_list[0]
             batch["tgt_pos"] = mask_return_list[1]
             if self.use_bow:
@@ -79,5 +84,6 @@ class PlatoReader(DialogReader):
                 batch["bow_pos"] = mask_return_list[3]
 
         batch_data_id = [record.data_id for record in batch_records]
-        batch["data_id"] = np.array(batch_data_id).astype("int64").reshape([-1, 1])
+        batch["data_id"] = np.array(batch_data_id).astype("int64").reshape(
+            [-1, 1])
         return batch

modules/text/text_generation/plato2_en_base/tasks/__init__.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Define task."""
-
-from .task_base import Task
-
-TASK_REGISTRY = {}
-
-__all__ = ["TASK_REGISTRY", "register_task", "create_task", "add_cmdline_args"]
-
-
-def register_task(name):
-    """
-    Register a new task class.
-    """
-
-    def __wrapped__(cls):
-        if name in TASK_REGISTRY:
-            raise ValueError(f"Cannot register duplicate task ({name})")
-        if not issubclass(cls, Task):
-            raise ValueError(f"Task ({name}: {cls.__name__}) must extend Task")
-        TASK_REGISTRY[name] = cls
-        return cls
-
-    return __wrapped__
-
-
-def create_task(args) -> Task:
-    """
-    Create a task.
-    """
-    return TASK_REGISTRY[args.task](args)
-
-
-def add_cmdline_args(parser):
-    """
-    Add cmdline argument of Task.
-    """
-    group = parser.add_argument_group("Task")
-    group.add_argument("--task", type=str, required=True)
-
-    args, _ = parser.parse_known_args()
-    if args.task not in TASK_REGISTRY:
-        raise ValueError(f"Unknown task type: {args.task}")
-    TASK_REGISTRY[args.task].add_cmdline_args(parser)
-    return group
-
-
-import plato2_en_base.tasks.dialog_generation
-import plato2_en_base.tasks.next_sentence_prediction

modules/text/text_generation/plato2_en_base/tasks/dialog_generation.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Dialogue generation task."""
-
-from collections import defaultdict
-import math
-
-from plato2_en_base.readers.dialog_reader import DialogReader
-from plato2_en_base.readers.plato_reader import PlatoReader
-from plato2_en_base.tasks import register_task
-from plato2_en_base.tasks.task_base import Task
-from plato2_en_base.utils.args import str2bool
-from plato2_en_base.utils.inference import create_predictor
-
-
-def post_process_context(token_ids, reader, merge=True):
-    """Post-process the context sequence."""
-    context = []
-    utt = []
-    for tok_id in token_ids[1:]:
-        if tok_id == reader.eos_id:
-            utt = reader.tokenizer.convert_ids_to_tokens(utt)
-            if merge:
-                utt = reader.tokenizer.merge_subword(utt)
-            context.append(utt)
-            utt = []
-        else:
-            utt.append(tok_id)
-    return context
-
-
-def post_process_response(token_ids, reader, merge=True):
-    """
-    Post-process the decoded sequence. Truncate from the first
-    <eos> and remove the <bos> and <eos> tokens currently.
-    """
-    eos_pos = len(token_ids)
-    for i, tok_id in enumerate(token_ids):
-        if tok_id == reader.eos_id:
-            eos_pos = i
-            break
-    token_ids = token_ids[1:eos_pos]
-    response = reader.tokenizer.convert_ids_to_tokens(token_ids)
-    if merge:
-        response = reader.tokenizer.merge_subword(response)
-    return token_ids, response
-
-
-def get_cross_turn_repetition(context, pred_tokens, eos_idx, is_cn=False):
-    """Get cross-turn repetition."""
-    if len(pred_tokens) == 0:
-        return 1.0
-    if is_cn:
-        context = ["".join(utt) for utt in context]
-        pred_tokens = "".join(pred_tokens)
-
-    pred_tri_grams = set()
-    for i in range(len(pred_tokens) - 2):
-        tri_gram = tuple(pred_tokens[i:i + 3])
-        pred_tri_grams.add(tri_gram)
-    for utt in context:
-        for i in range(len(utt) - 2):
-            tri_gram = tuple(utt[i:i + 3])
-            if tri_gram in pred_tri_grams:
-                return 1.0
-    return 0.0
-
-
-def get_in_turn_repetition(pred, is_cn=False):
-    """Get in-turn repetition."""
-    if len(pred) == 0:
-        return 1.0
-    if isinstance(pred[0], str):
-        pred = [tok.lower() for tok in pred]
-        if is_cn:
-            pred = "".join(pred)
-    tri_grams = set()
-    for i in range(len(pred) - 2):
-        tri_gram = tuple(pred[i:i + 3])
-        if tri_gram in tri_grams:
-            return 1.0
-        tri_grams.add(tri_gram)
-    return 0.0
-
-
-def get_nsp_score_batch(nsp_predictor, predictions):
-    """
-    Get NSP scores of a batch.
-    """
-    import argparse
-    from collections import namedtuple
-
-    from plato2_en_base.readers.nsp_reader import NSPReader
-    from plato2_en_base.utils.args import parse_args
-    from plato2_en_base.tasks.next_sentence_prediction import NextSentencePrediction
-
-    parser = argparse.ArgumentParser()
-    NextSentencePrediction.add_cmdline_args(parser)
-    parser.add_argument("--num_samples", type=int, default=None)
-    parser.add_argument("--config_path", type=str, required=True)
-    parser.add_argument("--mem_efficient", type=str2bool, default=False)
-
-    args = parse_args(parser, allow_unknown=True)
-    args.load(args.config_path)
-    if not args.mem_efficient:
-        if args.num_samples:
-            args.batch_size *= args.num_samples
-        if args.latent_type_size:
-            args.batch_size *= args.latent_type_size
-    args.tokenized_input = True
-    reader = NSPReader(args)
-
-    def __reader__():
-        headers = ["src", "tgt", "data_id"]
-
-        Example = namedtuple("Example", headers)
-
-        for i, info in enumerate(predictions):
-            context = post_process_context(info["context_token_ids"], reader, merge=False)
-            context_tokenized_input = " [SEP] ".join(" ".join(utt) for utt in context)
-            _, response = post_process_response(info["response_token_ids"], reader, merge=False)
-            response_tokenized_input = " ".join(response)
-            example = Example(src=context_tokenized_input, tgt=response_tokenized_input, data_id=i)
-            record = reader._convert_example_to_record(example, is_infer=True)
-            yield record
-        return
-
-    generator = reader.data_generator(
-        reader=__reader__,
-        is_infer=True,
-        phase="test",
-    )
-
-    steps = 0
-    for data in generator():
-        outputs = nsp_predictor(data)
-        for probs, data_id in zip(outputs[0], outputs[-1]):
-            data_id = data_id[0]
-            info = predictions[data_id]
-            info["nsp_score"] = float(probs[1])
-
-    return
-
-
-@register_task("DialogGeneration")
-class DialogGeneration(Task):
-    """
-    Define dialogue response generation.
-    """
-
-    @classmethod
-    def add_cmdline_args(cls, parser):
-        """Add cmdline argurments."""
-        group = parser.add_argument_group("Task")
-        group.add_argument("--do_generation", type=str2bool, default=False)
-        group.add_argument("--is_cn", type=str2bool, default=False)
-
-        group.add_argument("--nsp_inference_model_path", type=str, default=None)
-        group.add_argument("--nsp_attention_style", type=str, default="bidirectional")
-
-        group.add_argument("--ranking_score", type=str, default="decode_score")
-
-        args, _ = parser.parse_known_args()
-        if args.model == "Plato":
-            PlatoReader.add_cmdline_args(parser)
-        else:
-            DialogReader.add_cmdline_args(parser)
-        return group
-
-    def __init__(self, args):
-        super(DialogGeneration, self).__init__(args)
-        self.do_generation = args.do_generation
-        self.is_cn = args.is_cn
-        if args.model == "Plato":
-            self.reader = PlatoReader(args)
-        else:
-            self.reader = DialogReader(args)
-
-        if args.nsp_inference_model_path:
-            self.nsp_predictor = create_predictor(args.nsp_inference_model_path, args.is_distributed)
-            self.nsp_attention_style = args.nsp_attention_style
-        else:
-            self.nsp_predictor = None
-
-        self.ranking_score = args.ranking_score
-        self.max_dec_len = args.max_dec_len
-        return
-
-    def _post_process_generation_output(self, predictions):
-        """
-        Post process generation output.
-
-        Calculate repetion, reranking.
-        """
-        for info in predictions:
-            tokens = post_process_context(info["context_token_ids"], self.reader)
-            pred_token_ids, pred_tokens = post_process_response(info["response_token_ids"], self.reader)
-            info["context"] = " [SEP] ".join(" ".join(u) for u in tokens)
-            info["response"] = " ".join(pred_tokens)
-            info["num_token"] = len(pred_token_ids)
-            info["cross_turn_repetition"] = get_cross_turn_repetition(tokens, pred_tokens, self.reader.eos_id,
-                                                                      self.is_cn)
-            info["in_turn_repetition"] = max(
-                get_in_turn_repetition(pred_tokens, self.is_cn), get_in_turn_repetition(pred_token_ids))
-        if self.nsp_predictor is not None:
-            get_nsp_score_batch(self.nsp_predictor, predictions)
-
-        group = defaultdict(list)
-        for info in predictions:
-            group[info["data_id"]].append(info)
-
-        predictions = []
-        for data_id in group:
-            infos = group[data_id]
-            for info in infos:
-                info["score"] = info[self.ranking_score]
-                if self.max_dec_len is not None and info["num_token"] >= self.max_dec_len:  # not ending
-                    info["score"] -= 1e3
-                elif info["cross_turn_repetition"] > 0:
-                    info["score"] -= 1e3
-                elif info["in_turn_repetition"] > 0:
-                    info["score"] -= 1e3
-            infos = sorted(infos, key=lambda info: -info["score"])
-            pred = infos[0]
-            keep_attr = ["data_id", "score", "response"]
-            pred = {k: pred[k] for k in keep_attr}
-            predictions.append(pred)
-        return predictions
-
-    def _post_process_scoring_output(self, predictions):
-        raise NotImplementedError
-
-    def _post_process_infer_output(self, predictions):
-        if self.do_generation:
-            return self._post_process_generation_output(predictions)
-        else:
-            return self._post_process_scoring_output(predictions)
-
-    def merge_mertrics_and_statistics(self, outputs, part_outputs):
-        """
-        Merge two evaulation output.
-        """
-        if outputs is None:
-            return part_outputs
-
-        if part_outputs is None:
-            return outputs
-
-        batch_size = outputs.pop("batch_size")
-        tokens_num = outputs.pop("tokens_num")
-        part_batch_size = part_outputs.pop("batch_size")
-        part_tokens_num = part_outputs.pop("tokens_num")
-
-        new_outputs = {"batch_size": batch_size + part_batch_size, "tokens_num": tokens_num + part_tokens_num}
-        for k in outputs:
-            if k.startswith("token_"):
-                new_outputs[k] = (
-                    outputs[k] * tokens_num + part_outputs[k] * part_tokens_num) / new_outputs["tokens_num"]
-            else:
-                new_outputs[k] = (
-                    outputs[k] * batch_size + part_outputs[k] * part_batch_size) / new_outputs["batch_size"]
-        return new_outputs
-
-    def get_metrics(self, outputs):
-        """
-        Get metrics.
-        """
-        if outputs is None:
-            raise ValueError("metrics is None")
-        outputs = dict(outputs)
-        outputs.pop("batch_size", None)
-        outputs.pop("tokens_num", None)
-        metrics = {}
-        for k in outputs:
-            if k.startswith("token_"):
-                metrics[k[6:]] = outputs[k]
-            else:
-                metrics[k] = outputs[k]
-            if k == "token_lm_loss":
-                metrics["ppl"] = math.exp(outputs[k])
-        return metrics

modules/text/text_generation/plato2_en_base/tasks/next_sentence_prediction.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Next sentence prediction task."""
-
-from plato2_en_base.readers.nsp_reader import NSPReader
-from plato2_en_base.tasks import register_task
-from plato2_en_base.tasks.task_base import Task
-from plato2_en_base.utils.args import str2bool
-
-
-@register_task("NextSentencePrediction")
-class NextSentencePrediction(Task):
-    """
-    Define dialogue response generation.
-    """
-
-    @classmethod
-    def add_cmdline_args(cls, parser):
-        """Add cmdline argurments."""
-        group = NSPReader.add_cmdline_args(parser)
-        return group
-
-    def __init__(self, args):
-        super(NextSentencePrediction, self).__init__(args)
-        self.reader = NSPReader(args)
-        return
-
-    def _post_process_infer_output(self, predictions):
-        predictions = [{
-            "data_id": data_id.tolist()[0],
-            "score": score.tolist()[1]
-        } for data_id, score in zip(predictions["data_id"], predictions["scores"])]
-        return predictions

modules/text/text_generation/plato2_en_base/tasks/task_base.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Task base."""
-
-from abc import abstractmethod, ABC
-
-from plato2_en_base.models.model_base import Model
-
-
-class Task(ABC):
-    """
-    Basic task.
-    """
-
-    def __init__(self, args):
-        return
-
-    def train_step(self, model: Model, inputs):
-        """Run one training step."""
-        outputs = model.train_step(inputs)
-        outputs = {k: v.tolist()[0] for k, v in outputs.items()}
-        return outputs
-
-    def eval_step(self, model: Model, inputs):
-        """Run one evaluation step"""
-        outputs = model.eval_step(inputs)
-        outputs = {k: v.tolist()[0] for k, v in outputs.items()}
-        return outputs
-
-    def infer_step(self, model: Model, inputs):
-        """Run one inference step."""
-        predictions = model.infer_step(inputs)
-        outputs = self._post_process_infer_output(predictions)
-        return outputs
-
-    def _post_process_infer_output(self, predictions):
-        """
-        Post-process inference output.
-        """
-        return predictions
-
-    def merge_mertrics_and_statistics(self, outputs, part_outputs):
-        """
-        Merge metrics and statistics.
-        """
-        if outputs is None:
-            return part_outputs
-
-        if part_outputs is None:
-            return outputs
-
-        batch_size = outputs.pop("batch_size")
-        part_batch_size = part_outputs.pop("batch_size")
-
-        new_outputs = {
-            "batch_size": batch_size + part_batch_size,
-        }
-        for k in outputs:
-            new_outputs[k] = (outputs[k] * batch_size + part_outputs[k] * part_batch_size) / new_outputs["batch_size"]
-        return new_outputs
-
-    def get_metrics(self, outputs):
-        """
-        Get metrics.
-        """
-        if outputs is None:
-            raise ValueError("metrics is None")
-        outputs = dict(outputs)
-        # pop statistics
-        outputs.pop("batch_size", None)
-        return outputs
-
-    def get_data_loader(self, model, *args, is_infer=False, **kwargs):
-        generator = self.reader.data_generator(*args, is_infer=is_infer, **kwargs)
-        return model.get_data_loader(generator, is_infer)

modules/text/text_generation/plato2_en_base/utils/__init__.py

@@ -14,160 +14,45 @@
 """Utils."""
 
 from itertools import chain
-import os
-import time
-import sys
-
 import numpy as np
-import paddle.fluid as fluid
+import paddle
 
 
-def to_lodtensor(data, place):
-    """Convert data to LoDTensor."""
-    if place is None:
-        return data
-    lengths = []
-    while isinstance(data[0], list):
-        lengths.append(list(map(len, data)))
-        data = [x for xs in data for x in xs]
-    if isinstance(data[0], float):
-        data = np.array(data, dtype="float32")
+def repeat_array(array, times):
+    """Repeate numpy array."""
+    if isinstance(array, list):
+        return list(chain(*([array] * times)))
     else:
-        data = np.array(data, dtype="int64")
-    data_tensor = fluid.LoDTensor()
-    data_tensor.set(data, place)
-    data_tensor.set_recursive_sequence_lengths(lengths)
-    return data_tensor
+        return np.concatenate([array] * times, axis=0)
+
+
+def gen_inputs(inputs, latent_type_size):
+    batch_size = len(inputs["data_id"])
+    new_bsz = batch_size * latent_type_size
+    inputs = {
+        name: repeat_array(array, latent_type_size)
+        for name, array in inputs.items()
+    }
+    # Add latent_id
+    inputs["latent_id"] = np.array(
+        [i for i in range(latent_type_size) for _ in range(batch_size)],
+        dtype="int64").reshape([-1, 1])
+
+    #print('\nplato_inputs:')
+    for key in inputs:
+        inputs[key] = paddle.to_tensor(inputs[key])
+        if key in [
+                'token_ids', 'type_ids', 'pos_ids', 'tgt_ids', 'tgt_pos',
+                'data_id'
+        ]:
+            inputs[key] = paddle.squeeze(inputs[key], axis=-1)
+        #print(key, inputs[key].shape, inputs[key].dtype)
+    return inputs
 
 
 def pad_batch_data(insts, pad_id=0):
     """Pad the instances to the max sequence length in batch. """
     max_len = max(map(len, insts))
-    inst_data = np.array([list(inst) + [pad_id] * (max_len - len(inst)) for inst in insts])
+    inst_data = np.array(
+        [list(inst) + [pad_id] * (max_len - len(inst)) for inst in insts])
     return inst_data.astype("int64").reshape([-1, max_len, 1])
-
-
-def convert_lodtensor_to_list(tensor):
-    data = np.array(tensor)
-    recursive_sequence_lengths = tensor.recursive_sequence_lengths()
-    recursive_sequence_lengths.reverse()
-    for i, lengths in enumerate(recursive_sequence_lengths):
-        shift = 0
-        new_data = []
-        for j, l in enumerate(lengths):
-            new_data.append(data[shift:shift + l])
-            shift += l
-        data = new_data
-    return data
-
-
-def concatenate_lodtensors(tensors, place):
-    """Concatenate LoD tensors."""
-    data = []
-    recursive_sequence_lengths = []
-    for tensor in tensors:
-        data.append(np.array(tensor))
-        recursive_sequence_lengths.append(tensor.recursive_sequence_lengths())
-    data = np.concatenate(data, axis=0)
-    recursive_sequence_lengths = [sum(lens, []) for lens in zip(*recursive_sequence_lengths)]
-    data_tensor = fluid.LoDTensor()
-    data_tensor.set(data, place)
-    data_tensor.set_recursive_sequence_lengths(recursive_sequence_lengths)
-    assert data_tensor.has_valid_recursive_sequence_lengths()
-    return data_tensor
-
-
-def repeat_array_or_tensor(array_or_tensor, place, times):
-    """Repeate numpy array or LoD tensor."""
-    if isinstance(array_or_tensor, fluid.LoDTensor):
-        data = [np.array(array_or_tensor)] * times
-        recursive_sequence_lengths = [array_or_tensor.recursive_sequence_lengths()] * times
-        data = np.concatenate(data, axis=0)
-        recursive_sequence_lengths = [sum(lens, []) for lens in zip(*recursive_sequence_lengths)]
-        data_tensor = fluid.LoDTensor()
-        data_tensor.set(data, place)
-        data_tensor.set_recursive_sequence_lengths(recursive_sequence_lengths)
-        assert data_tensor.has_valid_recursive_sequence_lengths()
-        return data_tensor
-    elif isinstance(array_or_tensor, list):
-        return list(chain(*([array_or_tensor] * times)))
-    else:
-        return np.concatenate([array_or_tensor] * times, axis=0)
-
-
-def slice_array_or_tensor(array_or_tensor, place, begin, end):
-    """Repeate numpy array or LoD tensor."""
-    if isinstance(array_or_tensor, fluid.LoDTensor):
-        data = convert_lodtensor_to_list(array_or_tensor)
-        data = data[begin:end]
-        return to_lodtensor(data, place)
-    else:
-        return array_or_tensor[begin:end]
-
-
-def init_checkpoint(exe, init_checkpoint_path, main_program):
-    """Initialize from checkpoint."""
-    assert os.path.exists(init_checkpoint_path), "[%s] cann't be found." % init_checkpoint_path
-
-    def existed_persitables(var):
-        """Whether var is a persistables."""
-        if not fluid.io.is_persistable(var):
-            return False
-        return os.path.exists(os.path.join(init_checkpoint_path, var.name))
-
-    fluid.io.load_vars(exe, init_checkpoint_path, main_program=main_program, predicate=existed_persitables)
-    print(f"Load model from {init_checkpoint_path}")
-
-
-def init_pretraining_params(exe, pretraining_params_path, main_program):
-    """Only initialize parameters."""
-    assert os.path.exists(pretraining_params_path), "[%s] cann't be found." % pretraining_params_path
-
-    def existed_params(var):
-        """Whether var is a parameter."""
-        if not isinstance(var, fluid.framework.Parameter):
-            return False
-        return os.path.exists(os.path.join(pretraining_params_path, var.name))
-
-    fluid.io.load_vars(exe, pretraining_params_path, main_program=main_program, predicate=existed_params)
-    print(f"Load pretraining parameters from {pretraining_params_path}.")
-
-    return
-
-
-class Timer(object):
-    def __init__(self):
-        self._pass_time = 0
-        self._start_time = None
-        return
-
-    def start(self):
-        self._start_time = time.time()
-
-    def pause(self):
-        self._pass_time += time.time() - self._start_time
-        self._start_time = None
-
-    def reset(self):
-        self._pass_time = 0
-
-    @property
-    def pass_time(self):
-        if self._start_time is None:
-            return self._pass_time
-        else:
-            return self._pass_time + time.time() - self._start_time
-
-
-ERROR_MESSAGE = "\nYou can not set use_cuda = True in the model because you are using paddlepaddle-cpu.\n \
-    Please: 1. Install paddlepaddle-gpu to run your models on GPU or 2. Set use_cuda = False to run models on CPU.\n"
-
-
-def check_cuda(use_cuda, err=ERROR_MESSAGE):
-    """Check CUDA."""
-    try:
-        if use_cuda and not fluid.is_compiled_with_cuda():
-            print(err)
-            sys.exit(1)
-    except Exception as e:
-        pass

modules/text/text_generation/plato2_en_base/utils/args.py

@@ -15,9 +15,6 @@
 
 import argparse
 import json
-import sys
-
-import paddle.fluid as fluid
 
 
 def str2bool(v):

modules/text/text_generation/plato2_en_base/utils/inference.py

-#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Inference utils."""
-
-import os
-
-import paddle.fluid as fluid
-
-
-def create_predictor(inference_model_path, is_distributed=False):
-    """Create predictor."""
-    if is_distributed:
-        dev_count = fluid.core.get_cuda_device_count()
-        gpu_id = int(os.getenv("FLAGS_selected_gpus"))
-    else:
-        dev_count = 1
-        gpu_id = 0
-
-    place = fluid.CUDAPlace(gpu_id)
-    exe = fluid.Executor(place)
-
-    scope = fluid.Scope()
-    with fluid.scope_guard(scope):
-        inference_prog, feed_target_names, fetch_targets = fluid.io.load_inference_model(inference_model_path, exe)
-
-    def __predict__(inputs):
-        with fluid.scope_guard(scope):
-            outputs = exe.run(inference_prog, feed=inputs, fetch_list=fetch_targets, return_numpy=True)
-            return outputs
-
-    return __predict__

modules/text/text_generation/plato2_en_base/utils/masking.py

@@ -15,8 +15,6 @@
 
 import numpy as np
 
-import plato2_en_base.utils
-
 
 def mask(batch_tokens,
          vocab_size,
@@ -47,14 +45,20 @@ def mask(batch_tokens,
         else:
             shift_len = 0
         for sent_index, sent in enumerate(batch_tokens):
-            sent_b_index = sent_b_starts[sent_index] if sent_b_starts is not None else 0
+            sent_b_index = sent_b_starts[
+                sent_index] if sent_b_starts is not None else 0
             need_cal = True
             if labels is not None:
-                label_pos.append(sent_index * max_len + len(sent) - 1 + shift_len)
+                label_pos.append(sent_index * max_len + len(sent) - 1 +
+                                 shift_len)
                 if labels[sent_index] == 0:
                     need_cal = False
             mask_label.extend(sent[sent_b_index + 1:])
-            mask_pos.extend([sent_index * max_len + i + shift_len for i in range(sent_b_index, len(sent) - 1)])
+            mask_pos.extend([
+                sent_index * max_len + i + shift_len
+                for i in range(sent_b_index,
+                               len(sent) - 1)
+            ])
         mask_label = np.array(mask_label).astype("int64").reshape([-1, 1])
         mask_pos = np.array(mask_pos).astype("int64").reshape([-1, 1])
         return_list = [mask_label, mask_pos]
@@ -64,14 +68,21 @@ def mask(batch_tokens,
             bow_label = []
             bow_pos = []
             for sent_index, sent in enumerate(batch_tokens):
-                sent_b_index = sent_b_starts[sent_index] if sent_b_starts is not None else 0
+                sent_b_index = sent_b_starts[
+                    sent_index] if sent_b_starts is not None else 0
 
                 def __filter__(tok_id):
                     # TODO: exclude [EOS] from bow loss
                     return True
 
-                bow_pos.extend([sent_index for i in range(sent_b_index + 1, len(sent)) if __filter__(sent[i])])
-                bow_label.extend([sent[i] for i in range(sent_b_index + 1, len(sent)) if __filter__(sent[i])])
+                bow_pos.extend([
+                    sent_index for i in range(sent_b_index + 1, len(sent))
+                    if __filter__(sent[i])
+                ])
+                bow_label.extend([
+                    sent[i] for i in range(sent_b_index + 1, len(sent))
+                    if __filter__(sent[i])
+                ])
             bow_label = np.array(bow_label).astype("int64").reshape([-1, 1])
             bow_pos = np.array(bow_pos).astype("int64").reshape([-1, 1])
             return_list += [bow_label, bow_pos]
@@ -80,7 +91,9 @@ def mask(batch_tokens,
         total_token_num = sum(map(len, batch_tokens))
         prob_mask = np.random.rand(total_token_num)
         # TODO: fix replace_ids, include [UNK]
-        replace_ids = np.random.randint(3, high=vocab_size, size=total_token_num)
+        replace_ids = np.random.randint(3,
+                                        high=vocab_size,
+                                        size=total_token_num)
         prob_index = 0
         for sent_index, sent in enumerate(batch_tokens):
             # add pair label position

modules/text/text_generation/plato2_en_base/utils/tokenization.py

@@ -14,14 +14,10 @@
 """Tokenization classes."""
 
 import collections
-import json
 import sentencepiece as spm
-import six
 import unicodedata
 
-from plato2_en_base.utils.args import str2bool
-
-SPIECE_UNDERLINE = u"▁".encode("utf-8")
+from .args import str2bool
 
 
 def clean_text(text):
@@ -79,15 +75,18 @@ def encode_ids(spm_model, text, sample=False):
 
 def convert_to_unicode(text):
     """Converts `text` to Unicode (if it's not already), assuming utf-8 input."""
-    if isinstance(text, six.binary_type):
+    if isinstance(text, str):
+        return text
+    elif isinstance(text, bytes):
         return text.decode("utf-8", "ignore")
-    return text
+    else:
+        raise ValueError("Unsupported string type: %s" % (type(text)))
 
 
 def load_vocab(vocab_file):
     """Loads a vocabulary file into a dictionary."""
     vocab = collections.OrderedDict()
-    fin = open(vocab_file)
+    fin = open(vocab_file, 'r', encoding="UTF-8")
     for num, line in enumerate(fin):
         items = convert_to_unicode(line.rstrip()).split("\t")
         if len(items) > 2: