Merge branch 'quant_embdding_demo' into 'develop'

add quant_embedding demo

See merge request !42

demo/quant/quant_embedding/README.md

+# Embedding量化示例
+
+本示例介绍如何使用Embedding量化的接口 [paddleslim.quant.quant_embedding]() 。``quant_embedding``接口将网络中的Embedding参数从``float32``类型量化到 ``8-bit``整数类型，在几乎不损失模型精度的情况下减少模型的存储空间和显存占用。
+
+接口如下：
+```
+quant_embedding(program, place, config, scope=None)
+```
+
+参数介绍：
+
+- program(fluid.Program) : 需要量化的program
+- scope(fluid.Scope, optional) : 用来获取和写入``Variable``, 如果设置为``None``,则使用``fluid.global_scope()``.
+- place(fluid.CPUPlace or fluid.CUDAPlace): 运行program的设备
+- config(dict) : 定义量化的配置。可以配置的参数有：
+    - ``'params_name'`` (str, required): 需要进行量化的参数名称，此参数必须设置。
+    - ``'quantize_type'`` (str, optional): 量化的类型，目前支持的类型是``'abs_max'``, 待支持的类型有 ``'log', 'product_quantization'``。 默认值是``'abs_max'``.
+    - ``'quantize_bits'``（int, optional): 量化的``bit``数，目前支持的``bit``数为8。默认值是8.
+    - ``'dtype'``(str, optional): 量化之后的数据类型， 目前支持的是``'int8'``. 默认值是``int8``。
+    - ``'threshold'``(float, optional): 量化之前将根据此阈值对需要量化的参数值进行``clip``. 如果不设置，则跳过``clip``过程直接量化。
+
+该接口对program的修改：
+
+量化前:
+
+<p align="center">
+<img src="./image/before.png" height=200 width=100 hspace='10'/> <br />
+<strong>图1：量化前的模型结构</strong>
+</p>
+
+量化后：
+
+<p align="center">
+<img src="./image/after.png" height=300 width=300 hspace='10'/> <br />
+<strong>图2: 量化后的模型结构</strong>
+</p>
+
+以下将以 ``基于skip-gram的word2vector模型`` 为例来说明如何使用``quant_embedding``接口。首先介绍 ``基于skip-gram的word2vector模型`` 的正常训练和测试流程。
+
+## 基于skip-gram的word2vector模型
+
+以下是本例的简要目录结构及说明：
+
+```text
+.
+├── cluster_train.py    # 分布式训练函数
+├── cluster_train.sh    # 本地模拟多机脚本
+├── train.py            # 训练函数
+├── infer.py            # 预测脚本
+├── net.py              # 网络结构
+├── preprocess.py       # 预处理脚本，包括构建词典和预处理文本
+├── reader.py           # 训练阶段的文本读写
+├── train.py            # 训练函数
+└── utils.py            # 通用函数
+
+```
+
+### 介绍
+本例实现了skip-gram模式的word2vector模型。
+
+同时推荐用户参考[ IPython Notebook demo](https://aistudio.baidu.com/aistudio/projectDetail/124377)
+
+### 数据下载
+全量数据集使用的是来自1 Billion Word Language Model Benchmark的(http://www.statmt.org/lm-benchmark) 的数据集.
+
+```bash
+mkdir data
+wget http://www.statmt.org/lm-benchmark/1-billion-word-language-modeling-benchmark-r13output.tar.gz
+tar xzvf 1-billion-word-language-modeling-benchmark-r13output.tar.gz
+mv 1-billion-word-language-modeling-benchmark-r13output/training-monolingual.tokenized.shuffled/ data/
+```
+
+备用数据地址下载命令如下
+
+```bash
+mkdir data
+wget https://paddlerec.bj.bcebos.com/word2vec/1-billion-word-language-modeling-benchmark-r13output.tar
+tar xvf 1-billion-word-language-modeling-benchmark-r13output.tar
+mv 1-billion-word-language-modeling-benchmark-r13output/training-monolingual.tokenized.shuffled/ data/
+```
+
+为了方便快速验证，我们也提供了经典的text8样例数据集，包含1700w个词。 下载命令如下
+
+```bash
+mkdir data
+wget https://paddlerec.bj.bcebos.com/word2vec/text.tar
+tar xvf text.tar
+mv text data/
+```
+
+
+### 数据预处理
+以样例数据集为例进行预处理。全量数据集注意解压后以training-monolingual.tokenized.shuffled 目录为预处理目录，和样例数据集的text目录并列。
+
+词典格式: 词<空格>词频。注意低频词用'UNK'表示
+
+可以按格式自建词典，如果自建词典跳过第一步。
+```
+the 1061396
+of 593677
+and 416629
+one 411764
+in 372201
+a 325873
+<UNK> 324608
+to 316376
+zero 264975
+nine 250430
+```
+
+第一步根据英文语料生成词典，中文语料可以通过修改text_strip方法自定义处理方法。
+
+```bash
+python preprocess.py --build_dict --build_dict_corpus_dir data/text/ --dict_path data/test_build_dict
+```
+
+第二步根据词典将文本转成id, 同时进行downsample，按照概率过滤常见词, 同时生成word和id映射的文件，文件名为词典+"_word_to_id_"。
+
+```bash
+python preprocess.py --filter_corpus --dict_path data/test_build_dict --input_corpus_dir data/text --output_corpus_dir data/convert_text8 --min_count 5 --downsample 0.001
+```
+
+### 训练
+具体的参数配置可运行
+
+
+```bash
+python train.py -h
+```
+
+单机多线程训练
+```bash
+OPENBLAS_NUM_THREADS=1 CPU_NUM=5 python train.py --train_data_dir data/convert_text8 --dict_path data/test_build_dict --num_passes 10 --batch_size 100 --model_output_dir v1_cpu5_b100_lr1dir --base_lr 1.0 --print_batch 1000 --with_speed --is_sparse
+```
+
+本地单机模拟多机训练
+
+```bash
+sh cluster_train.sh
+```
+
+本示例中按照单机多线程训练的命令进行训练，训练完毕后，可看到在当前文件夹下保存模型的路径为:     ``v1_cpu5_b100_lr1dir``, 运行 ``ls v1_cpu5_b100_lr1dir``可看到该文件夹下保存了训练的10个epoch的模型文件。
+```
+pass-0  pass-1  pass-2  pass-3  pass-4  pass-5  pass-6  pass-7  pass-8  pass-9
+```
+
+### 预测
+测试集下载命令如下
+
+```bash
+#全量数据集测试集
+wget https://paddlerec.bj.bcebos.com/word2vec/test_dir.tar
+#样本数据集测试集
+wget https://paddlerec.bj.bcebos.com/word2vec/test_mid_dir.tar
+```
+
+预测命令，注意词典名称需要加后缀"_word_to_id_", 此文件是预处理阶段生成的。
+```bash
+python infer.py --infer_epoch --test_dir data/test_mid_dir --dict_path data/test_build_dict_word_to_id_ --batch_size 20000 --model_dir v1_cpu5_b100_lr1dir/  --start_index 0 --last_index 9
+```
+运行该预测命令, 可看到如下输出
+```
+('start index: ', 0, ' last_index:', 9)
+('vocab_size:', 63642)
+step:1 249
+epoch:0          acc:0.014
+step:1 590
+epoch:1          acc:0.033
+step:1 982
+epoch:2          acc:0.055
+step:1 1338
+epoch:3          acc:0.075
+step:1 1653
+epoch:4          acc:0.093
+step:1 1914
+epoch:5          acc:0.107
+step:1 2204
+epoch:6          acc:0.124
+step:1 2416
+epoch:7          acc:0.136
+step:1 2606
+epoch:8          acc:0.146
+step:1 2722
+epoch:9          acc:0.153
+```
+
+## 量化``基于skip-gram的word2vector模型``
+
+量化配置为:
+```
+config = {
+        'params_name': 'emb',
+        'quantize_type': 'abs_max'
+        }
+```
+
+运行命令为：
+
+```bash
+python infer.py --infer_epoch --test_dir data/test_mid_dir --dict_path data/test_build_dict_word_to_id_ --batch_size 20000 --model_dir v1_cpu5_b100_lr1dir/  --start_index 0 --last_index 9 --emb_quant True
+```
+
+运行输出为:
+
+```
+('start index: ', 0, ' last_index:', 9)
+('vocab_size:', 63642)
+quant_embedding config {'quantize_type': 'abs_max', 'params_name': 'emb', 'quantize_bits': 8, 'dtype': 'int8'}
+step:1 253
+epoch:0          acc:0.014
+quant_embedding config {'quantize_type': 'abs_max', 'params_name': 'emb', 'quantize_bits': 8, 'dtype': 'int8'}
+step:1 586
+epoch:1          acc:0.033
+quant_embedding config {'quantize_type': 'abs_max', 'params_name': 'emb', 'quantize_bits': 8, 'dtype': 'int8'}
+step:1 970
+epoch:2          acc:0.054
+quant_embedding config {'quantize_type': 'abs_max', 'params_name': 'emb', 'quantize_bits': 8, 'dtype': 'int8'}
+step:1 1364
+epoch:3          acc:0.077
+quant_embedding config {'quantize_type': 'abs_max', 'params_name': 'emb', 'quantize_bits': 8, 'dtype': 'int8'}
+step:1 1642
+epoch:4          acc:0.092
+quant_embedding config {'quantize_type': 'abs_max', 'params_name': 'emb', 'quantize_bits': 8, 'dtype': 'int8'}
+step:1 1936
+epoch:5          acc:0.109
+quant_embedding config {'quantize_type': 'abs_max', 'params_name': 'emb', 'quantize_bits': 8, 'dtype': 'int8'}
+step:1 2216
+epoch:6          acc:0.124
+quant_embedding config {'quantize_type': 'abs_max', 'params_name': 'emb', 'quantize_bits': 8, 'dtype': 'int8'}
+step:1 2419
+epoch:7          acc:0.136
+quant_embedding config {'quantize_type': 'abs_max', 'params_name': 'emb', 'quantize_bits': 8, 'dtype': 'int8'}
+step:1 2603
+epoch:8          acc:0.146
+quant_embedding config {'quantize_type': 'abs_max', 'params_name': 'emb', 'quantize_bits': 8, 'dtype': 'int8'}
+step:1 2719
+epoch:9          acc:0.153
+```
+
+量化后的模型保存在``./output_quant``中，可看到量化后的参数``'emb.int8'``的大小为3.9M, 在``./v1_cpu5_b100_lr1dir``中可看到量化前的参数``'emb'``的大小为16M。

demo/quant/quant_embedding/cluster_train.py

+from __future__ import print_function
+import argparse
+import logging
+import os
+import time
+import math
+import random
+import numpy as np
+import paddle
+import paddle.fluid as fluid
+import six
+import reader
+from net import skip_gram_word2vec
+
+logging.basicConfig(format='%(asctime)s - %(levelname)s - %(message)s')
+logger = logging.getLogger("fluid")
+logger.setLevel(logging.INFO)
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(
+        description="PaddlePaddle Word2vec example")
+    parser.add_argument(
+        '--train_data_dir',
+        type=str,
+        default='./data/text',
+        help="The path of taining dataset")
+    parser.add_argument(
+        '--base_lr',
+        type=float,
+        default=0.01,
+        help="The number of learing rate (default: 0.01)")
+    parser.add_argument(
+        '--save_step',
+        type=int,
+        default=500000,
+        help="The number of step to save (default: 500000)")
+    parser.add_argument(
+        '--print_batch',
+        type=int,
+        default=100,
+        help="The number of print_batch (default: 10)")
+    parser.add_argument(
+        '--dict_path',
+        type=str,
+        default='./data/1-billion_dict',
+        help="The path of data dict")
+    parser.add_argument(
+        '--batch_size',
+        type=int,
+        default=500,
+        help="The size of mini-batch (default:500)")
+    parser.add_argument(
+        '--num_passes',
+        type=int,
+        default=10,
+        help="The number of passes to train (default: 10)")
+    parser.add_argument(
+        '--model_output_dir',
+        type=str,
+        default='models',
+        help='The path for model to store (default: models)')
+    parser.add_argument('--nce_num', type=int, default=5, help='nce_num')
+    parser.add_argument(
+        '--embedding_size',
+        type=int,
+        default=64,
+        help='sparse feature hashing space for index processing')
+    parser.add_argument(
+        '--is_sparse',
+        action='store_true',
+        required=False,
+        default=False,
+        help='embedding and nce will use sparse or not, (default: False)')
+    parser.add_argument(
+        '--with_speed',
+        action='store_true',
+        required=False,
+        default=False,
+        help='print speed or not , (default: False)')
+    parser.add_argument(
+        '--role', type=str, default='pserver', help='trainer or pserver')
+    parser.add_argument(
+        '--endpoints',
+        type=str,
+        default='127.0.0.1:6000',
+        help='The pserver endpoints, like: 127.0.0.1:6000, 127.0.0.1:6001')
+    parser.add_argument(
+        '--current_endpoint',
+        type=str,
+        default='127.0.0.1:6000',
+        help='The current_endpoint')
+    parser.add_argument(
+        '--trainer_id',
+        type=int,
+        default=0,
+        help='trainer id ,only trainer_id=0 save model')
+    parser.add_argument(
+        '--trainers',
+        type=int,
+        default=1,
+        help='The num of trianers, (default: 1)')
+    return parser.parse_args()
+
+
+def convert_python_to_tensor(weight, batch_size, sample_reader):
+    def __reader__():
+        cs = np.array(weight).cumsum()
+        result = [[], []]
+        for sample in sample_reader():
+            for i, fea in enumerate(sample):
+                result[i].append(fea)
+            if len(result[0]) == batch_size:
+                tensor_result = []
+                for tensor in result:
+                    t = fluid.Tensor()
+                    dat = np.array(tensor, dtype='int64')
+                    if len(dat.shape) > 2:
+                        dat = dat.reshape((dat.shape[0], dat.shape[2]))
+                    elif len(dat.shape) == 1:
+                        dat = dat.reshape((-1, 1))
+                    t.set(dat, fluid.CPUPlace())
+                    tensor_result.append(t)
+                tt = fluid.Tensor()
+                neg_array = cs.searchsorted(np.random.sample(args.nce_num))
+                neg_array = np.tile(neg_array, batch_size)
+                tt.set(
+                    neg_array.reshape((batch_size, args.nce_num)),
+                    fluid.CPUPlace())
+                tensor_result.append(tt)
+                yield tensor_result
+                result = [[], []]
+
+    return __reader__
+
+
+def train_loop(args, train_program, reader, py_reader, loss, trainer_id,
+               weight):
+
+    py_reader.decorate_tensor_provider(
+        convert_python_to_tensor(weight, args.batch_size, reader.train()))
+
+    place = fluid.CPUPlace()
+    exe = fluid.Executor(place)
+    exe.run(fluid.default_startup_program())
+
+    print("CPU_NUM:" + str(os.getenv("CPU_NUM")))
+
+    train_exe = exe
+
+    for pass_id in range(args.num_passes):
+        py_reader.start()
+        time.sleep(10)
+        epoch_start = time.time()
+        batch_id = 0
+        start = time.time()
+        try:
+            while True:
+
+                loss_val = train_exe.run(fetch_list=[loss.name])
+                loss_val = np.mean(loss_val)
+
+                if batch_id % args.print_batch == 0:
+                    logger.info(
+                        "TRAIN --> pass: {} batch: {} loss: {} reader queue:{}".
+                        format(pass_id, batch_id,
+                               loss_val.mean(), py_reader.queue.size()))
+                if args.with_speed:
+                    if batch_id % 500 == 0 and batch_id != 0:
+                        elapsed = (time.time() - start)
+                        start = time.time()
+                        samples = 1001 * args.batch_size * int(
+                            os.getenv("CPU_NUM"))
+                        logger.info("Time used: {}, Samples/Sec: {}".format(
+                            elapsed, samples / elapsed))
+
+                if batch_id % args.save_step == 0 and batch_id != 0:
+                    model_dir = args.model_output_dir + '/pass-' + str(
+                        pass_id) + ('/batch-' + str(batch_id))
+                    if trainer_id == 0:
+                        fluid.io.save_params(executor=exe, dirname=model_dir)
+                        print("model saved in %s" % model_dir)
+                batch_id += 1
+
+        except fluid.core.EOFException:
+            py_reader.reset()
+            epoch_end = time.time()
+            logger.info("Epoch: {0}, Train total expend: {1} ".format(
+                pass_id, epoch_end - epoch_start))
+            model_dir = args.model_output_dir + '/pass-' + str(pass_id)
+            if trainer_id == 0:
+                fluid.io.save_params(executor=exe, dirname=model_dir)
+                print("model saved in %s" % model_dir)
+
+
+def GetFileList(data_path):
+    return os.listdir(data_path)
+
+
+def train(args):
+
+    if not os.path.isdir(args.model_output_dir) and args.trainer_id == 0:
+        os.mkdir(args.model_output_dir)
+
+    filelist = GetFileList(args.train_data_dir)
+    word2vec_reader = reader.Word2VecReader(
+        args.dict_path, args.train_data_dir, filelist, 0, 1)
+
+    logger.info("dict_size: {}".format(word2vec_reader.dict_size))
+    np_power = np.power(np.array(word2vec_reader.id_frequencys), 0.75)
+    id_frequencys_pow = np_power / np_power.sum()
+
+    loss, py_reader = skip_gram_word2vec(
+        word2vec_reader.dict_size,
+        args.embedding_size,
+        is_sparse=args.is_sparse,
+        neg_num=args.nce_num)
+
+    optimizer = fluid.optimizer.SGD(
+        learning_rate=fluid.layers.exponential_decay(
+            learning_rate=args.base_lr,
+            decay_steps=100000,
+            decay_rate=0.999,
+            staircase=True))
+
+    optimizer.minimize(loss)
+
+    logger.info("run dist training")
+
+    t = fluid.DistributeTranspiler()
+    t.transpile(
+        args.trainer_id, pservers=args.endpoints, trainers=args.trainers)
+    if args.role == "pserver":
+        print("run psever")
+        pserver_prog = t.get_pserver_program(args.current_endpoint)
+        pserver_startup = t.get_startup_program(args.current_endpoint,
+                                                pserver_prog)
+        exe = fluid.Executor(fluid.CPUPlace())
+        exe.run(pserver_startup)
+        exe.run(pserver_prog)
+    elif args.role == "trainer":
+        print("run trainer")
+        train_loop(args,
+                   t.get_trainer_program(), word2vec_reader, py_reader, loss,
+                   args.trainer_id, id_frequencys_pow)
+
+
+if __name__ == '__main__':
+    args = parse_args()
+    train(args)

demo/quant/quant_embedding/cluster_train.sh

+#!/bin/bash
+
+#export GLOG_v=30
+#export GLOG_logtostderr=1
+
+# start pserver0
+export CPU_NUM=5 
+export FLAGS_rpc_deadline=3000000
+python cluster_train.py \
+    --train_data_dir data/convert_text8 \
+    --dict_path data/test_build_dict \
+    --batch_size 100 \
+    --model_output_dir dis_model \
+    --base_lr 1.0 \
+    --print_batch 1 \
+    --is_sparse \
+    --with_speed \
+    --role pserver \
+    --endpoints 127.0.0.1:6000,127.0.0.1:6001 \
+    --current_endpoint 127.0.0.1:6000 \
+    --trainers 2 \
+    > pserver0.log 2>&1 &
+
+python cluster_train.py \
+    --train_data_dir data/convert_text8 \
+    --dict_path data/test_build_dict \
+    --batch_size 100 \
+    --model_output_dir dis_model \
+    --base_lr 1.0 \
+    --print_batch 1 \
+    --is_sparse \
+    --with_speed \
+    --role pserver \
+    --endpoints 127.0.0.1:6000,127.0.0.1:6001 \
+    --current_endpoint 127.0.0.1:6001 \
+    --trainers 2 \
+    > pserver1.log 2>&1 &
+
+# start trainer0
+python cluster_train.py \
+    --train_data_dir data/convert_text8 \
+    --dict_path data/test_build_dict \
+    --batch_size 100 \
+    --model_output_dir dis_model \
+    --base_lr 1.0 \
+    --print_batch 1000 \
+    --is_sparse \
+    --with_speed \
+    --role trainer \
+    --endpoints 127.0.0.1:6000,127.0.0.1:6001 \
+    --trainers 2 \
+    --trainer_id 0 \
+    > trainer0.log 2>&1 &
+# start trainer1
+python cluster_train.py \
+    --train_data_dir data/convert_text8 \
+    --dict_path data/test_build_dict \
+    --batch_size 100 \
+    --model_output_dir dis_model \
+    --base_lr 1.0 \
+    --print_batch 1000 \
+    --is_sparse \
+    --with_speed \
+    --role trainer \
+    --endpoints 127.0.0.1:6000,127.0.0.1:6001 \
+    --trainers 2 \
+    --trainer_id 1 \
+    > trainer1.log 2>&1 &

demo/quant/quant_embedding/infer.py

+import argparse
+import sys
+import time
+import math
+import unittest
+import contextlib
+import numpy as np
+import six
+import paddle.fluid as fluid
+import paddle
+import net
+import utils
+sys.path.append(sys.path[0] + "/../../../")
+from paddleslim.quant import quant_embedding
+
+
+def parse_args():
+    parser = argparse.ArgumentParser("PaddlePaddle Word2vec infer example")
+    parser.add_argument(
+        '--dict_path',
+        type=str,
+        default='./data/data_c/1-billion_dict_word_to_id_',
+        help="The path of dic")
+    parser.add_argument(
+        '--infer_epoch',
+        action='store_true',
+        required=False,
+        default=False,
+        help='infer by epoch')
+    parser.add_argument(
+        '--infer_step',
+        action='store_true',
+        required=False,
+        default=False,
+        help='infer by step')
+    parser.add_argument(
+        '--test_dir', type=str, default='test_data', help='test file address')
+    parser.add_argument(
+        '--print_step', type=int, default='500000', help='print step')
+    parser.add_argument(
+        '--start_index', type=int, default='0', help='start index')
+    parser.add_argument(
+        '--start_batch', type=int, default='1', help='start index')
+    parser.add_argument(
+        '--end_batch', type=int, default='13', help='start index')
+    parser.add_argument(
+        '--last_index', type=int, default='100', help='last index')
+    parser.add_argument(
+        '--model_dir', type=str, default='model', help='model dir')
+    parser.add_argument(
+        '--use_cuda', type=int, default='0', help='whether use cuda')
+    parser.add_argument(
+        '--batch_size', type=int, default='5', help='batch_size')
+    parser.add_argument(
+        '--emb_size', type=int, default='64', help='batch_size')
+    parser.add_argument(
+        '--emb_quant',
+        type=bool,
+        default=False,
+        help='whether to quant embedding parameter')
+    args = parser.parse_args()
+    return args
+
+
+def infer_epoch(args, vocab_size, test_reader, use_cuda, i2w):
+    """ inference function """
+    place = fluid.CUDAPlace(0) if use_cuda else fluid.CPUPlace()
+    exe = fluid.Executor(place)
+    emb_size = args.emb_size
+    batch_size = args.batch_size
+    with fluid.scope_guard(fluid.Scope()):
+        main_program = fluid.Program()
+        with fluid.program_guard(main_program):
+            values, pred = net.infer_network(vocab_size, emb_size)
+            for epoch in range(start_index, last_index + 1):
+                copy_program = main_program.clone()
+                model_path = model_dir + "/pass-" + str(epoch)
+                fluid.io.load_params(
+                    executor=exe,
+                    dirname=model_path,
+                    main_program=copy_program)
+                if args.emb_quant:
+                    config = {'params_name': 'emb', 'quantize_type': 'abs_max'}
+                    copy_program = quant_embedding(copy_program, place, config)
+                    fluid.io.save_persistables(
+                        exe,
+                        './output_quant/pass-' + str(epoch),
+                        main_program=copy_program)
+
+                accum_num = 0
+                accum_num_sum = 0.0
+                t0 = time.time()
+                step_id = 0
+                for data in test_reader():
+                    step_id += 1
+                    b_size = len([dat[0] for dat in data])
+                    wa = np.array(
+                        [dat[0] for dat in data]).astype("int64").reshape(
+                            b_size, 1)
+                    wb = np.array(
+                        [dat[1] for dat in data]).astype("int64").reshape(
+                            b_size, 1)
+                    wc = np.array(
+                        [dat[2] for dat in data]).astype("int64").reshape(
+                            b_size, 1)
+
+                    label = [dat[3] for dat in data]
+                    input_word = [dat[4] for dat in data]
+                    para = exe.run(copy_program,
+                                   feed={
+                                       "analogy_a": wa,
+                                       "analogy_b": wb,
+                                       "analogy_c": wc,
+                                       "all_label":
+                                       np.arange(vocab_size).reshape(
+                                           vocab_size, 1).astype("int64"),
+                                   },
+                                   fetch_list=[pred.name, values],
+                                   return_numpy=False)
+                    pre = np.array(para[0])
+                    val = np.array(para[1])
+                    for ii in range(len(label)):
+                        top4 = pre[ii]
+                        accum_num_sum += 1
+                        for idx in top4:
+                            if int(idx) in input_word[ii]:
+                                continue
+                            if int(idx) == int(label[ii][0]):
+                                accum_num += 1
+                            break
+                    if step_id % 1 == 0:
+                        print("step:%d %d " % (step_id, accum_num))
+
+                print("epoch:%d \t acc:%.3f " %
+                      (epoch, 1.0 * accum_num / accum_num_sum))
+
+
+def infer_step(args, vocab_size, test_reader, use_cuda, i2w):
+    """ inference function """
+    place = fluid.CUDAPlace(0) if use_cuda else fluid.CPUPlace()
+    exe = fluid.Executor(place)
+    emb_size = args.emb_size
+    batch_size = args.batch_size
+    with fluid.scope_guard(fluid.Scope()):
+        main_program = fluid.Program()
+        with fluid.program_guard(main_program):
+            values, pred = net.infer_network(vocab_size, emb_size)
+            for epoch in range(start_index, last_index + 1):
+                for batchid in range(args.start_batch, args.end_batch):
+                    copy_program = main_program.clone()
+                    model_path = model_dir + "/pass-" + str(epoch) + (
+                        '/batch-' + str(batchid * args.print_step))
+                    fluid.io.load_params(
+                        executor=exe,
+                        dirname=model_path,
+                        main_program=copy_program)
+                    accum_num = 0
+                    accum_num_sum = 0.0
+                    t0 = time.time()
+                    step_id = 0
+                    for data in test_reader():
+                        step_id += 1
+                        b_size = len([dat[0] for dat in data])
+                        wa = np.array(
+                            [dat[0] for dat in data]).astype("int64").reshape(
+                                b_size, 1)
+                        wb = np.array(
+                            [dat[1] for dat in data]).astype("int64").reshape(
+                                b_size, 1)
+                        wc = np.array(
+                            [dat[2] for dat in data]).astype("int64").reshape(
+                                b_size, 1)
+
+                        label = [dat[3] for dat in data]
+                        input_word = [dat[4] for dat in data]
+                        para = exe.run(
+                            copy_program,
+                            feed={
+                                "analogy_a": wa,
+                                "analogy_b": wb,
+                                "analogy_c": wc,
+                                "all_label":
+                                np.arange(vocab_size).reshape(vocab_size, 1),
+                            },
+                            fetch_list=[pred.name, values],
+                            return_numpy=False)
+                        pre = np.array(para[0])
+                        val = np.array(para[1])
+                        for ii in range(len(label)):
+                            top4 = pre[ii]
+                            accum_num_sum += 1
+                            for idx in top4:
+                                if int(idx) in input_word[ii]:
+                                    continue
+                                if int(idx) == int(label[ii][0]):
+                                    accum_num += 1
+                                break
+                        if step_id % 1 == 0:
+                            print("step:%d %d " % (step_id, accum_num))
+                    print("epoch:%d \t acc:%.3f " %
+                          (epoch, 1.0 * accum_num / accum_num_sum))
+                    t1 = time.time()
+
+
+if __name__ == "__main__":
+    args = parse_args()
+    start_index = args.start_index
+    last_index = args.last_index
+    test_dir = args.test_dir
+    model_dir = args.model_dir
+    batch_size = args.batch_size
+    dict_path = args.dict_path
+    use_cuda = True if args.use_cuda else False
+    print("start index: ", start_index, " last_index:", last_index)
+    vocab_size, test_reader, id2word = utils.prepare_data(
+        test_dir, dict_path, batch_size=batch_size)
+    print("vocab_size:", vocab_size)
+    if args.infer_step:
+        infer_step(
+            args,
+            vocab_size,
+            test_reader=test_reader,
+            use_cuda=use_cuda,
+            i2w=id2word)
+    else:
+        infer_epoch(
+            args,
+            vocab_size,
+            test_reader=test_reader,
+            use_cuda=use_cuda,
+            i2w=id2word)

demo/quant/quant_embedding/net.py

+# Copyright (c) 2018 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.
+"""
+neural network for word2vec
+"""
+from __future__ import print_function
+import math
+import numpy as np
+import paddle.fluid as fluid
+
+
+def skip_gram_word2vec(dict_size, embedding_size, is_sparse=False, neg_num=5):
+
+    datas = []
+    input_word = fluid.layers.data(name="input_word", shape=[1], dtype='int64')
+    true_word = fluid.layers.data(name='true_label', shape=[1], dtype='int64')
+    neg_word = fluid.layers.data(
+        name="neg_label", shape=[neg_num], dtype='int64')
+
+    datas.append(input_word)
+    datas.append(true_word)
+    datas.append(neg_word)
+
+    py_reader = fluid.layers.create_py_reader_by_data(
+        capacity=64, feed_list=datas, name='py_reader', use_double_buffer=True)
+
+    words = fluid.layers.read_file(py_reader)
+    init_width = 0.5 / embedding_size
+    input_emb = fluid.layers.embedding(
+        input=words[0],
+        is_sparse=is_sparse,
+        size=[dict_size, embedding_size],
+        param_attr=fluid.ParamAttr(
+            name='emb',
+            initializer=fluid.initializer.Uniform(-init_width, init_width)))
+
+    true_emb_w = fluid.layers.embedding(
+        input=words[1],
+        is_sparse=is_sparse,
+        size=[dict_size, embedding_size],
+        param_attr=fluid.ParamAttr(
+            name='emb_w', initializer=fluid.initializer.Constant(value=0.0)))
+
+    true_emb_b = fluid.layers.embedding(
+        input=words[1],
+        is_sparse=is_sparse,
+        size=[dict_size, 1],
+        param_attr=fluid.ParamAttr(
+            name='emb_b', initializer=fluid.initializer.Constant(value=0.0)))
+    neg_word_reshape = fluid.layers.reshape(words[2], shape=[-1, 1])
+    neg_word_reshape.stop_gradient = True
+
+    neg_emb_w = fluid.layers.embedding(
+        input=neg_word_reshape,
+        is_sparse=is_sparse,
+        size=[dict_size, embedding_size],
+        param_attr=fluid.ParamAttr(
+            name='emb_w', learning_rate=1.0))
+
+    neg_emb_w_re = fluid.layers.reshape(
+        neg_emb_w, shape=[-1, neg_num, embedding_size])
+    neg_emb_b = fluid.layers.embedding(
+        input=neg_word_reshape,
+        is_sparse=is_sparse,
+        size=[dict_size, 1],
+        param_attr=fluid.ParamAttr(
+            name='emb_b', learning_rate=1.0))
+
+    neg_emb_b_vec = fluid.layers.reshape(neg_emb_b, shape=[-1, neg_num])
+    true_logits = fluid.layers.elementwise_add(
+        fluid.layers.reduce_sum(
+            fluid.layers.elementwise_mul(input_emb, true_emb_w),
+            dim=1,
+            keep_dim=True),
+        true_emb_b)
+    input_emb_re = fluid.layers.reshape(
+        input_emb, shape=[-1, 1, embedding_size])
+    neg_matmul = fluid.layers.matmul(
+        input_emb_re, neg_emb_w_re, transpose_y=True)
+    neg_matmul_re = fluid.layers.reshape(neg_matmul, shape=[-1, neg_num])
+    neg_logits = fluid.layers.elementwise_add(neg_matmul_re, neg_emb_b_vec)
+    #nce loss
+
+    label_ones = fluid.layers.fill_constant_batch_size_like(
+        true_logits, shape=[-1, 1], value=1.0, dtype='float32')
+    label_zeros = fluid.layers.fill_constant_batch_size_like(
+        true_logits, shape=[-1, neg_num], value=0.0, dtype='float32')
+
+    true_xent = fluid.layers.sigmoid_cross_entropy_with_logits(true_logits,
+                                                               label_ones)
+    neg_xent = fluid.layers.sigmoid_cross_entropy_with_logits(neg_logits,
+                                                              label_zeros)
+    cost = fluid.layers.elementwise_add(
+        fluid.layers.reduce_sum(
+            true_xent, dim=1),
+        fluid.layers.reduce_sum(
+            neg_xent, dim=1))
+    avg_cost = fluid.layers.reduce_mean(cost)
+    return avg_cost, py_reader
+
+
+def infer_network(vocab_size, emb_size):
+    analogy_a = fluid.layers.data(name="analogy_a", shape=[1], dtype='int64')
+    analogy_b = fluid.layers.data(name="analogy_b", shape=[1], dtype='int64')
+    analogy_c = fluid.layers.data(name="analogy_c", shape=[1], dtype='int64')
+    all_label = fluid.layers.data(
+        name="all_label",
+        shape=[vocab_size, 1],
+        dtype='int64',
+        append_batch_size=False)
+    emb_all_label = fluid.layers.embedding(
+        input=all_label, size=[vocab_size, emb_size], param_attr="emb")
+
+    emb_a = fluid.layers.embedding(
+        input=analogy_a, size=[vocab_size, emb_size], param_attr="emb")
+    emb_b = fluid.layers.embedding(
+        input=analogy_b, size=[vocab_size, emb_size], param_attr="emb")
+    emb_c = fluid.layers.embedding(
+        input=analogy_c, size=[vocab_size, emb_size], param_attr="emb")
+    target = fluid.layers.elementwise_add(
+        fluid.layers.elementwise_sub(emb_b, emb_a), emb_c)
+    emb_all_label_l2 = fluid.layers.l2_normalize(x=emb_all_label, axis=1)
+    dist = fluid.layers.matmul(x=target, y=emb_all_label_l2, transpose_y=True)
+    values, pred_idx = fluid.layers.topk(input=dist, k=4)
+    return values, pred_idx

demo/quant/quant_embedding/preprocess.py

+# -*- coding: utf-8 -*
+import os
+import random
+import re
+import six
+import argparse
+import io
+import math
+prog = re.compile("[^a-z ]", flags=0)
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(
+        description="Paddle Fluid word2 vector preprocess")
+    parser.add_argument(
+        '--build_dict_corpus_dir', type=str, help="The dir of corpus")
+    parser.add_argument(
+        '--input_corpus_dir', type=str, help="The dir of input corpus")
+    parser.add_argument(
+        '--output_corpus_dir', type=str, help="The dir of output corpus")
+    parser.add_argument(
+        '--dict_path',
+        type=str,
+        default='./dict',
+        help="The path of dictionary ")
+    parser.add_argument(
+        '--min_count',
+        type=int,
+        default=5,
+        help="If the word count is less then min_count, it will be removed from dict"
+    )
+    parser.add_argument(
+        '--downsample',
+        type=float,
+        default=0.001,
+        help="filter word by downsample")
+    parser.add_argument(
+        '--filter_corpus',
+        action='store_true',
+        default=False,
+        help='Filter corpus')
+    parser.add_argument(
+        '--build_dict',
+        action='store_true',
+        default=False,
+        help='Build dict from corpus')
+    return parser.parse_args()
+
+
+def text_strip(text):
+    #English Preprocess Rule
+    return prog.sub("", text.lower())
+
+
+# Shameless copy from Tensorflow https://github.com/tensorflow/tensor2tensor/blob/master/tensor2tensor/data_generators/text_encoder.py
+# Unicode utility functions that work with Python 2 and 3
+def native_to_unicode(s):
+    if _is_unicode(s):
+        return s
+    try:
+        return _to_unicode(s)
+    except UnicodeDecodeError:
+        res = _to_unicode(s, ignore_errors=True)
+        return res
+
+
+def _is_unicode(s):
+    if six.PY2:
+        if isinstance(s, unicode):
+            return True
+    else:
+        if isinstance(s, str):
+            return True
+    return False
+
+
+def _to_unicode(s, ignore_errors=False):
+    if _is_unicode(s):
+        return s
+    error_mode = "ignore" if ignore_errors else "strict"
+    return s.decode("utf-8", errors=error_mode)
+
+
+def filter_corpus(args):
+    """
+    filter corpus and convert id.
+    """
+    word_count = dict()
+    word_to_id_ = dict()
+    word_all_count = 0
+    id_counts = []
+    word_id = 0
+    #read dict
+    with io.open(args.dict_path, 'r', encoding='utf-8') as f:
+        for line in f:
+            word, count = line.split()[0], int(line.split()[1])
+            word_count[word] = count
+            word_to_id_[word] = word_id
+            word_id += 1
+            id_counts.append(count)
+            word_all_count += count
+
+    #write word2id file
+    print("write word2id file to : " + args.dict_path + "_word_to_id_")
+    with io.open(
+            args.dict_path + "_word_to_id_", 'w+', encoding='utf-8') as fid:
+        for k, v in word_to_id_.items():
+            fid.write(k + " " + str(v) + '\n')
+    #filter corpus and convert id
+    if not os.path.exists(args.output_corpus_dir):
+        os.makedirs(args.output_corpus_dir)
+    for file in os.listdir(args.input_corpus_dir):
+        with io.open(args.output_corpus_dir + '/convert_' + file, "w") as wf:
+            with io.open(
+                    args.input_corpus_dir + '/' + file,
+                    encoding='utf-8') as rf:
+                print(args.input_corpus_dir + '/' + file)
+                for line in rf:
+                    signal = False
+                    line = text_strip(line)
+                    words = line.split()
+                    for item in words:
+                        if item in word_count:
+                            idx = word_to_id_[item]
+                        else:
+                            idx = word_to_id_[native_to_unicode('<UNK>')]
+                        count_w = id_counts[idx]
+                        corpus_size = word_all_count
+                        keep_prob = (
+                            math.sqrt(count_w /
+                                      (args.downsample * corpus_size)) + 1
+                        ) * (args.downsample * corpus_size) / count_w
+                        r_value = random.random()
+                        if r_value > keep_prob:
+                            continue
+                        wf.write(_to_unicode(str(idx) + " "))
+                        signal = True
+                    if signal:
+                        wf.write(_to_unicode("\n"))
+
+
+def build_dict(args):
+    """
+    proprocess the data, generate dictionary and save into dict_path.
+    :param corpus_dir: the input data dir.
+    :param dict_path: the generated dict path. the data in dict is "word count"
+    :param min_count:
+    :return:
+    """
+    # word to count
+
+    word_count = dict()
+
+    for file in os.listdir(args.build_dict_corpus_dir):
+        with io.open(
+                args.build_dict_corpus_dir + "/" + file,
+                encoding='utf-8') as f:
+            print("build dict : ", args.build_dict_corpus_dir + "/" + file)
+            for line in f:
+                line = text_strip(line)
+                words = line.split()
+                for item in words:
+                    if item in word_count:
+                        word_count[item] = word_count[item] + 1
+                    else:
+                        word_count[item] = 1
+
+    item_to_remove = []
+    for item in word_count:
+        if word_count[item] <= args.min_count:
+            item_to_remove.append(item)
+
+    unk_sum = 0
+    for item in item_to_remove:
+        unk_sum += word_count[item]
+        del word_count[item]
+    #sort by count
+    word_count[native_to_unicode('<UNK>')] = unk_sum
+    word_count = sorted(
+        word_count.items(), key=lambda word_count: -word_count[1])
+
+    with io.open(args.dict_path, 'w+', encoding='utf-8') as f:
+        for k, v in word_count:
+            f.write(k + " " + str(v) + '\n')
+
+
+if __name__ == "__main__":
+    args = parse_args()
+    if args.build_dict:
+        build_dict(args)
+    elif args.filter_corpus:
+        filter_corpus(args)
+    else:
+        print(
+            "error command line, please choose --build_dict or --filter_corpus")

demo/quant/quant_embedding/reader.py

+# -*- coding: utf-8 -*
+
+import numpy as np
+import preprocess
+import logging
+import math
+import random
+import io
+
+logging.basicConfig(format='%(asctime)s - %(levelname)s - %(message)s')
+logger = logging.getLogger("fluid")
+logger.setLevel(logging.INFO)
+
+
+class NumpyRandomInt(object):
+    def __init__(self, a, b, buf_size=1000):
+        self.idx = 0
+        self.buffer = np.random.random_integers(a, b, buf_size)
+        self.a = a
+        self.b = b
+
+    def __call__(self):
+        if self.idx == len(self.buffer):
+            self.buffer = np.random.random_integers(self.a, self.b,
+                                                    len(self.buffer))
+            self.idx = 0
+
+        result = self.buffer[self.idx]
+        self.idx += 1
+        return result
+
+
+class Word2VecReader(object):
+    def __init__(self,
+                 dict_path,
+                 data_path,
+                 filelist,
+                 trainer_id,
+                 trainer_num,
+                 window_size=5):
+        self.window_size_ = window_size
+        self.data_path_ = data_path
+        self.filelist = filelist
+        self.trainer_id = trainer_id
+        self.trainer_num = trainer_num
+
+        word_all_count = 0
+        id_counts = []
+        word_id = 0
+
+        with io.open(dict_path, 'r', encoding='utf-8') as f:
+            for line in f:
+                word, count = line.split()[0], int(line.split()[1])
+                word_id += 1
+                id_counts.append(count)
+                word_all_count += count
+
+        self.word_all_count = word_all_count
+        self.corpus_size_ = word_all_count
+        self.dict_size = len(id_counts)
+        self.id_counts_ = id_counts
+
+        print("corpus_size:", self.corpus_size_)
+        self.id_frequencys = [
+            float(count) / word_all_count for count in self.id_counts_
+        ]
+        print("dict_size = " + str(self.dict_size) + " word_all_count = " +
+              str(word_all_count))
+
+        self.random_generator = NumpyRandomInt(1, self.window_size_ + 1)
+
+    def get_context_words(self, words, idx):
+        """
+        Get the context word list of target word.
+        words: the words of the current line
+        idx: input word index
+        window_size: window size
+        """
+        target_window = self.random_generator()
+        start_point = idx - target_window  # if (idx - target_window) > 0 else 0
+        if start_point < 0:
+            start_point = 0
+        end_point = idx + target_window
+        targets = words[start_point:idx] + words[idx + 1:end_point + 1]
+        return targets
+
+    def train(self):
+        def nce_reader():
+            for file in self.filelist:
+                with io.open(
+                        self.data_path_ + "/" + file, 'r',
+                        encoding='utf-8') as f:
+                    logger.info("running data in {}".format(self.data_path_ +
+                                                            "/" + file))
+                    count = 1
+                    for line in f:
+                        if self.trainer_id == count % self.trainer_num:
+                            word_ids = [int(w) for w in line.split()]
+                            for idx, target_id in enumerate(word_ids):
+                                context_word_ids = self.get_context_words(
+                                    word_ids, idx)
+                                for context_id in context_word_ids:
+                                    yield [target_id], [context_id]
+                        count += 1
+
+        return nce_reader

demo/quant/quant_embedding/train.py

+from __future__ import print_function
+import argparse
+import logging
+import os
+import time
+import math
+import random
+import numpy as np
+import paddle
+import paddle.fluid as fluid
+import six
+import reader
+from net import skip_gram_word2vec
+
+logging.basicConfig(format='%(asctime)s - %(levelname)s - %(message)s')
+logger = logging.getLogger("fluid")
+logger.setLevel(logging.INFO)
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(
+        description="PaddlePaddle Word2vec example")
+    parser.add_argument(
+        '--train_data_dir',
+        type=str,
+        default='./data/text',
+        help="The path of taining dataset")
+    parser.add_argument(
+        '--base_lr',
+        type=float,
+        default=0.01,
+        help="The number of learing rate (default: 0.01)")
+    parser.add_argument(
+        '--save_step',
+        type=int,
+        default=500000,
+        help="The number of step to save (default: 500000)")
+    parser.add_argument(
+        '--print_batch',
+        type=int,
+        default=10,
+        help="The number of print_batch (default: 10)")
+    parser.add_argument(
+        '--dict_path',
+        type=str,
+        default='./data/1-billion_dict',
+        help="The path of data dict")
+    parser.add_argument(
+        '--batch_size',
+        type=int,
+        default=500,
+        help="The size of mini-batch (default:500)")
+    parser.add_argument(
+        '--num_passes',
+        type=int,
+        default=10,
+        help="The number of passes to train (default: 10)")
+    parser.add_argument(
+        '--model_output_dir',
+        type=str,
+        default='models',
+        help='The path for model to store (default: models)')
+    parser.add_argument('--nce_num', type=int, default=5, help='nce_num')
+    parser.add_argument(
+        '--embedding_size',
+        type=int,
+        default=64,
+        help='sparse feature hashing space for index processing')
+    parser.add_argument(
+        '--is_sparse',
+        action='store_true',
+        required=False,
+        default=False,
+        help='embedding and nce will use sparse or not, (default: False)')
+    parser.add_argument(
+        '--with_speed',
+        action='store_true',
+        required=False,
+        default=False,
+        help='print speed or not , (default: False)')
+    return parser.parse_args()
+
+
+def convert_python_to_tensor(weight, batch_size, sample_reader):
+    def __reader__():
+        cs = np.array(weight).cumsum()
+        result = [[], []]
+        for sample in sample_reader():
+            for i, fea in enumerate(sample):
+                result[i].append(fea)
+            if len(result[0]) == batch_size:
+                tensor_result = []
+                for tensor in result:
+                    t = fluid.Tensor()
+                    dat = np.array(tensor, dtype='int64')
+                    if len(dat.shape) > 2:
+                        dat = dat.reshape((dat.shape[0], dat.shape[2]))
+                    elif len(dat.shape) == 1:
+                        dat = dat.reshape((-1, 1))
+                    t.set(dat, fluid.CPUPlace())
+                    tensor_result.append(t)
+                tt = fluid.Tensor()
+                neg_array = cs.searchsorted(np.random.sample(args.nce_num))
+                neg_array = np.tile(neg_array, batch_size)
+                tt.set(
+                    neg_array.reshape((batch_size, args.nce_num)),
+                    fluid.CPUPlace())
+                tensor_result.append(tt)
+                yield tensor_result
+                result = [[], []]
+
+    return __reader__
+
+
+def train_loop(args, train_program, reader, py_reader, loss, trainer_id,
+               weight):
+
+    py_reader.decorate_tensor_provider(
+        convert_python_to_tensor(weight, args.batch_size, reader.train()))
+
+    place = fluid.CPUPlace()
+    exe = fluid.Executor(place)
+    exe.run(fluid.default_startup_program())
+
+    exec_strategy = fluid.ExecutionStrategy()
+    exec_strategy.use_experimental_executor = True
+
+    print("CPU_NUM:" + str(os.getenv("CPU_NUM")))
+    exec_strategy.num_threads = int(os.getenv("CPU_NUM"))
+
+    build_strategy = fluid.BuildStrategy()
+    if int(os.getenv("CPU_NUM")) > 1:
+        build_strategy.reduce_strategy = fluid.BuildStrategy.ReduceStrategy.Reduce
+
+    train_exe = fluid.ParallelExecutor(
+        use_cuda=False,
+        loss_name=loss.name,
+        main_program=train_program,
+        build_strategy=build_strategy,
+        exec_strategy=exec_strategy)
+
+    for pass_id in range(args.num_passes):
+        py_reader.start()
+        time.sleep(10)
+        epoch_start = time.time()
+        batch_id = 0
+        start = time.time()
+        try:
+            while True:
+
+                loss_val = train_exe.run(fetch_list=[loss.name])
+                loss_val = np.mean(loss_val)
+
+                if batch_id % args.print_batch == 0:
+                    logger.info(
+                        "TRAIN --> pass: {} batch: {} loss: {} reader queue:{}".
+                        format(pass_id, batch_id,
+                               loss_val.mean(), py_reader.queue.size()))
+                if args.with_speed:
+                    if batch_id % 500 == 0 and batch_id != 0:
+                        elapsed = (time.time() - start)
+                        start = time.time()
+                        samples = 1001 * args.batch_size * int(
+                            os.getenv("CPU_NUM"))
+                        logger.info("Time used: {}, Samples/Sec: {}".format(
+                            elapsed, samples / elapsed))
+
+                if batch_id % args.save_step == 0 and batch_id != 0:
+                    model_dir = args.model_output_dir + '/pass-' + str(
+                        pass_id) + ('/batch-' + str(batch_id))
+                    if trainer_id == 0:
+                        fluid.io.save_params(executor=exe, dirname=model_dir)
+                        print("model saved in %s" % model_dir)
+                batch_id += 1
+
+        except fluid.core.EOFException:
+            py_reader.reset()
+            epoch_end = time.time()
+            logger.info("Epoch: {0}, Train total expend: {1} ".format(
+                pass_id, epoch_end - epoch_start))
+            model_dir = args.model_output_dir + '/pass-' + str(pass_id)
+            if trainer_id == 0:
+                fluid.io.save_params(executor=exe, dirname=model_dir)
+                print("model saved in %s" % model_dir)
+
+
+def GetFileList(data_path):
+    return os.listdir(data_path)
+
+
+def train(args):
+
+    if not os.path.isdir(args.model_output_dir):
+        os.mkdir(args.model_output_dir)
+
+    filelist = GetFileList(args.train_data_dir)
+    word2vec_reader = reader.Word2VecReader(
+        args.dict_path, args.train_data_dir, filelist, 0, 1)
+
+    logger.info("dict_size: {}".format(word2vec_reader.dict_size))
+    np_power = np.power(np.array(word2vec_reader.id_frequencys), 0.75)
+    id_frequencys_pow = np_power / np_power.sum()
+
+    loss, py_reader = skip_gram_word2vec(
+        word2vec_reader.dict_size,
+        args.embedding_size,
+        is_sparse=args.is_sparse,
+        neg_num=args.nce_num)
+
+    optimizer = fluid.optimizer.SGD(
+        learning_rate=fluid.layers.exponential_decay(
+            learning_rate=args.base_lr,
+            decay_steps=100000,
+            decay_rate=0.999,
+            staircase=True))
+
+    optimizer.minimize(loss)
+
+    # do local training 
+    logger.info("run local training")
+    main_program = fluid.default_main_program()
+    train_loop(args, main_program, word2vec_reader, py_reader, loss, 0,
+               id_frequencys_pow)
+
+
+if __name__ == '__main__':
+    args = parse_args()
+    train(args)

demo/quant/quant_embedding/utils.py

+import sys
+import collections
+import six
+import time
+import numpy as np
+import paddle.fluid as fluid
+import paddle
+import os
+import preprocess
+
+
+def BuildWord_IdMap(dict_path):
+    word_to_id = dict()
+    id_to_word = dict()
+    with open(dict_path, 'r') as f:
+        for line in f:
+            word_to_id[line.split(' ')[0]] = int(line.split(' ')[1])
+            id_to_word[int(line.split(' ')[1])] = line.split(' ')[0]
+    return word_to_id, id_to_word
+
+
+def prepare_data(file_dir, dict_path, batch_size):
+    w2i, i2w = BuildWord_IdMap(dict_path)
+    vocab_size = len(i2w)
+    reader = paddle.batch(test(file_dir, w2i), batch_size)
+    return vocab_size, reader, i2w
+
+
+def native_to_unicode(s):
+    if _is_unicode(s):
+        return s
+    try:
+        return _to_unicode(s)
+    except UnicodeDecodeError:
+        res = _to_unicode(s, ignore_errors=True)
+        return res
+
+
+def _is_unicode(s):
+    if six.PY2:
+        if isinstance(s, unicode):
+            return True
+    else:
+        if isinstance(s, str):
+            return True
+    return False
+
+
+def _to_unicode(s, ignore_errors=False):
+    if _is_unicode(s):
+        return s
+    error_mode = "ignore" if ignore_errors else "strict"
+    return s.decode("utf-8", errors=error_mode)
+
+
+def strip_lines(line, vocab):
+    return _replace_oov(vocab, native_to_unicode(line))
+
+
+def _replace_oov(original_vocab, line):
+    """Replace out-of-vocab words with "<UNK>".
+  This maintains compatibility with published results.
+  Args:
+    original_vocab: a set of strings (The standard vocabulary for the dataset)
+    line: a unicode string - a space-delimited sequence of words.
+  Returns:
+    a unicode string - a space-delimited sequence of words.
+  """
+    return u" ".join([
+        word if word in original_vocab else u"<UNK>" for word in line.split()
+    ])
+
+
+def reader_creator(file_dir, word_to_id):
+    def reader():
+        files = os.listdir(file_dir)
+        for fi in files:
+            with open(file_dir + '/' + fi, "r") as f:
+                for line in f:
+                    if ':' in line:
+                        pass
+                    else:
+                        line = strip_lines(line.lower(), word_to_id)
+                        line = line.split()
+                        yield [word_to_id[line[0]]], [word_to_id[line[1]]], [
+                            word_to_id[line[2]]
+                        ], [word_to_id[line[3]]], [
+                            word_to_id[line[0]], word_to_id[line[1]],
+                            word_to_id[line[2]]
+                        ]
+
+    return reader
+
+
+def test(test_dir, w2i):
+    return reader_creator(test_dir, w2i)