# 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. import math from collections import OrderedDict import paddle.fluid as fluid from paddlerec.core.utils import envs from paddlerec.core.model import Model as ModelBase class Model(ModelBase): def __init__(self, config): ModelBase.__init__(self, config) def _init_hyper_parameters(self): self.is_distributed = True if envs.get_trainer( ) == "CtrTrainer" else False self.sparse_feature_number = envs.get_global_env( "hyper_parameters.sparse_feature_number", None) self.sparse_feature_dim = envs.get_global_env( "hyper_parameters.sparse_feature_dim", None) self.is_sparse = envs.get_global_env("hyper_parameters.is_sparse", False) self.use_batchnorm = envs.get_global_env( "hyper_parameters.use_batchnorm", False) self.use_dropout = envs.get_global_env("hyper_parameters.use_dropout", False) self.dropout_prob = envs.get_global_env( "hyper_parameters.dropout_prob", None) self.layer_sizes = envs.get_global_env("hyper_parameters.fc_sizes", None) self.loss_type = envs.get_global_env("hyper_parameters.loss_type", 'logloss') self.reg = envs.get_global_env("hyper_parameters.reg", 1e-4) self.num_field = envs.get_global_env("hyper_parameters.num_field", None) self.act = envs.get_global_env("hyper_parameters.act", None) def net(self, inputs, is_infer=False): raw_feat_idx = self._sparse_data_var[1] # (batch_size * num_field) * 1 raw_feat_value = self._dense_data_var[0] # batch_size * num_field self.label = self._sparse_data_var[0] # batch_size * 1 init_value_ = 0.1 feat_idx = raw_feat_idx feat_value = fluid.layers.reshape( raw_feat_value, [-1, self.num_field, 1]) # batch_size * num_field * 1 # ------------------------- first order term -------------------------- first_weights_re = fluid.embedding( input=feat_idx, is_sparse=self.is_sparse, is_distributed=self.is_distributed, dtype='float32', size=[self.sparse_feature_number + 1, 1], padding_idx=0, param_attr=fluid.ParamAttr( initializer=fluid.initializer.TruncatedNormalInitializer( loc=0.0, scale=init_value_), regularizer=fluid.regularizer.L1DecayRegularizer(self.reg)) ) # (batch_size * num_field) * 1 * 1(embedding_size) first_weights = fluid.layers.reshape( first_weights_re, shape=[-1, self.num_field, 1]) # batch_size * num_field * 1 y_first_order = fluid.layers.reduce_sum((first_weights * feat_value), 1) # batch_size * 1 # ------------------------- second order term -------------------------- feat_embeddings_re = fluid.embedding( input=feat_idx, is_sparse=self.is_sparse, is_distributed=self.is_distributed, dtype='float32', size=[self.sparse_feature_number + 1, self.sparse_feature_dim], padding_idx=0, param_attr=fluid.ParamAttr( initializer=fluid.initializer.TruncatedNormalInitializer( loc=0.0, scale=init_value_ / math.sqrt(float(self.sparse_feature_dim)))) ) # (batch_size * num_field) * 1 * embedding_size feat_embeddings = fluid.layers.reshape( feat_embeddings_re, shape=[-1, self.num_field, self.sparse_feature_dim ]) # batch_size * num_field * embedding_size feat_embeddings = feat_embeddings * feat_value # batch_size * num_field * embedding_size # sum_square part summed_features_emb = fluid.layers.reduce_sum( feat_embeddings, 1) # batch_size * embedding_size summed_features_emb_square = fluid.layers.square( summed_features_emb) # batch_size * embedding_size # square_sum part squared_features_emb = fluid.layers.square( feat_embeddings) # batch_size * num_field * embedding_size squared_sum_features_emb = fluid.layers.reduce_sum( squared_features_emb, 1) # batch_size * embedding_size y_FM = 0.5 * (summed_features_emb_square - squared_sum_features_emb ) # batch_size * embedding_size if self.use_batchnorm: y_FM = fluid.layers.batch_norm(input=y_FM, is_test=is_infer) if self.use_dropout: y_FM = fluid.layers.dropout( x=y_FM, dropout_prob=self.dropout_prob, is_test=is_infer) # ------------------------- DNN -------------------------- y_dnn = y_FM for s in self.layer_sizes: if self.use_batchnorm: y_dnn = fluid.layers.fc( input=y_dnn, size=s, act=self.act, param_attr=fluid.ParamAttr(initializer=fluid.initializer. TruncatedNormalInitializer( loc=0.0, scale=init_value_ / math.sqrt(float(10)))), bias_attr=fluid.ParamAttr(initializer=fluid.initializer. TruncatedNormalInitializer( loc=0.0, scale=init_value_))) y_dnn = fluid.layers.batch_norm( input=y_dnn, act=self.act, is_test=is_infer) else: y_dnn = fluid.layers.fc( input=y_dnn, size=s, act=self.act, param_attr=fluid.ParamAttr(initializer=fluid.initializer. TruncatedNormalInitializer( loc=0.0, scale=init_value_ / math.sqrt(float(10)))), bias_attr=fluid.ParamAttr(initializer=fluid.initializer. TruncatedNormalInitializer( loc=0.0, scale=init_value_))) if self.use_dropout: y_dnn = fluid.layers.dropout( x=y_dnn, dropout_prob=self.dropout_prob, is_test=is_infer) y_dnn = fluid.layers.fc( input=y_dnn, size=1, act=None, param_attr=fluid.ParamAttr( initializer=fluid.initializer.TruncatedNormalInitializer( loc=0.0, scale=init_value_)), bias_attr=fluid.ParamAttr( initializer=fluid.initializer.TruncatedNormalInitializer( loc=0.0, scale=init_value_))) # ------------------------- Predict -------------------------- self.predict = fluid.layers.sigmoid(y_first_order + y_dnn) if self.loss_type == "squqre_loss": cost = fluid.layers.mse_loss( input=self.predict, label=fluid.layers.cast(self.label, "float32")) else: cost = fluid.layers.log_loss( input=self.predict, label=fluid.layers.cast(self.label, "float32")) # default log_loss avg_cost = fluid.layers.reduce_sum(cost) self._cost = avg_cost predict_2d = fluid.layers.concat([1 - self.predict, self.predict], 1) label_int = fluid.layers.cast(self.label, 'int64') auc_var, batch_auc_var, _ = fluid.layers.auc(input=predict_2d, label=label_int, slide_steps=0) self._metrics["AUC"] = auc_var self._metrics["BATCH_AUC"] = batch_auc_var if is_infer: self._infer_results["AUC"] = auc_var