# Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserve. # # 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. import math import sys import numpy as np import paddle.v2 as paddle import paddle.v2.fluid.core as core import paddle.v2.fluid.framework as framework import paddle.v2.fluid.layers as layers import paddle.v2.fluid.nets as nets from paddle.v2.fluid.executor import Executor from paddle.v2.fluid.optimizer import SGDOptimizer IS_SPARSE = True USE_GPU = False BATCH_SIZE = 256 def get_usr_combined_features(): # FIXME(dzh) : old API integer_value(10) may has range check. # currently we don't have user configurated check. USR_DICT_SIZE = paddle.dataset.movielens.max_user_id() + 1 uid = layers.data(name='user_id', shape=[1], dtype='int64') usr_emb = layers.embedding( input=uid, dtype='float32', size=[USR_DICT_SIZE, 32], param_attr='user_table', is_sparse=IS_SPARSE) usr_fc = layers.fc(input=usr_emb, size=32) USR_GENDER_DICT_SIZE = 2 usr_gender_id = layers.data(name='gender_id', shape=[1], dtype='int64') usr_gender_emb = layers.embedding( input=usr_gender_id, size=[USR_GENDER_DICT_SIZE, 16], param_attr='gender_table', is_sparse=IS_SPARSE) usr_gender_fc = layers.fc(input=usr_gender_emb, size=16) USR_AGE_DICT_SIZE = len(paddle.dataset.movielens.age_table) usr_age_id = layers.data(name='age_id', shape=[1], dtype="int64") usr_age_emb = layers.embedding( input=usr_age_id, size=[USR_AGE_DICT_SIZE, 16], is_sparse=IS_SPARSE, param_attr='age_table') usr_age_fc = layers.fc(input=usr_age_emb, size=16) USR_JOB_DICT_SIZE = paddle.dataset.movielens.max_job_id() + 1 usr_job_id = layers.data(name='job_id', shape=[1], dtype="int64") usr_job_emb = layers.embedding( input=usr_job_id, size=[USR_JOB_DICT_SIZE, 16], param_attr='job_table', is_sparse=IS_SPARSE) usr_job_fc = layers.fc(input=usr_job_emb, size=16) concat_embed = layers.concat( input=[usr_fc, usr_gender_fc, usr_age_fc, usr_job_fc], axis=1) usr_combined_features = layers.fc(input=concat_embed, size=200, act="tanh") return usr_combined_features def get_mov_combined_features(): MOV_DICT_SIZE = paddle.dataset.movielens.max_movie_id() + 1 mov_id = layers.data(name='movie_id', shape=[1], dtype='int64') mov_emb = layers.embedding( input=mov_id, dtype='float32', size=[MOV_DICT_SIZE, 32], param_attr='movie_table', is_sparse=IS_SPARSE) mov_fc = layers.fc(input=mov_emb, size=32) CATEGORY_DICT_SIZE = len(paddle.dataset.movielens.movie_categories()) category_id = layers.data(name='category_id', shape=[1], dtype='int64') mov_categories_emb = layers.embedding( input=category_id, size=[CATEGORY_DICT_SIZE, 32], is_sparse=IS_SPARSE) mov_categories_hidden = layers.sequence_pool( input=mov_categories_emb, pool_type="sum") MOV_TITLE_DICT_SIZE = len(paddle.dataset.movielens.get_movie_title_dict()) mov_title_id = layers.data(name='movie_title', shape=[1], dtype='int64') mov_title_emb = layers.embedding( input=mov_title_id, size=[MOV_TITLE_DICT_SIZE, 32], is_sparse=IS_SPARSE) mov_title_conv = nets.sequence_conv_pool( input=mov_title_emb, num_filters=32, filter_size=3, act="tanh", pool_type="sum") concat_embed = layers.concat( input=[mov_fc, mov_categories_hidden, mov_title_conv], axis=1) # FIXME(dzh) : need tanh operator mov_combined_features = layers.fc(input=concat_embed, size=200, act="tanh") return mov_combined_features def model(): usr_combined_features = get_usr_combined_features() mov_combined_features = get_mov_combined_features() # need cos sim inference = layers.cos_sim(X=usr_combined_features, Y=mov_combined_features) scale_infer = layers.scale(x=inference, scale=5.0) label = layers.data(name='score', shape=[1], dtype='float32') square_cost = layers.square_error_cost(input=scale_infer, label=label) avg_cost = layers.mean(x=square_cost) return avg_cost def main(): cost = model() sgd_optimizer = SGDOptimizer(learning_rate=0.2) opts = sgd_optimizer.minimize(cost) if USE_GPU: place = core.CUDAPlace(0) else: place = core.CPUPlace() exe = Executor(place) exe.run(framework.default_startup_program()) train_reader = paddle.batch( paddle.reader.shuffle( paddle.dataset.movielens.train(), buf_size=8192), batch_size=BATCH_SIZE) feeding = { 'user_id': 0, 'gender_id': 1, 'age_id': 2, 'job_id': 3, 'movie_id': 4, 'category_id': 5, 'movie_title': 6, 'score': 7 } def func_feed(feeding, data): feed_tensors = {} for (key, idx) in feeding.iteritems(): tensor = core.LoDTensor() if key != "category_id" and key != "movie_title": if key == "score": numpy_data = np.array(map(lambda x: x[idx], data)).astype( "float32") else: numpy_data = np.array(map(lambda x: x[idx], data)).astype( "int64") else: numpy_data = map(lambda x: np.array(x[idx]).astype("int64"), data) lod_info = [len(item) for item in numpy_data] offset = 0 lod = [offset] for item in lod_info: offset += item lod.append(offset) numpy_data = np.concatenate(numpy_data, axis=0) tensor.set_lod([lod]) numpy_data = numpy_data.reshape([numpy_data.shape[0], 1]) tensor.set(numpy_data, place) feed_tensors[key] = tensor return feed_tensors PASS_NUM = 100 for pass_id in range(PASS_NUM): for data in train_reader(): outs = exe.run(framework.default_main_program(), feed=func_feed(feeding, data), fetch_list=[cost]) out = np.array(outs[0]) if out[0] < 6.0: # if avg cost less than 6.0, we think our code is good. exit(0) if math.isnan(float(out[0])): sys.exit("got NaN loss, training failed.") main()