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import os
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import sys
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sys.path.append(os.getcwd())
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import pickle
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import numpy as np
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import pandas as pd
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from tqdm import tqdm
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import os
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from sklearn.preprocessing import LabelEncoder, MinMaxScaler
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import warnings
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from ranking.subject.rank_comm import save_rank_results
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from deepctr.models import DIFM
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from deepctr.feature_column import SparseFeat, DenseFeat, get_feature_names
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from tensorflow.keras import backend as K
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from tensorflow.keras.layers import *
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from tensorflow.keras.models import *
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from tensorflow.keras.callbacks import *
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from tensorflow.keras.models import save_model
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import tensorflow as tf
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from tensorflow.compat.v1 import ConfigProto
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from tensorflow.compat.v1 import InteractiveSession
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from config import offline_mode, subject_features_save_path
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from config import subject_train_user_item_feats
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from config import subject_val_user_item_feats
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from config import subject_test_user_item_feats
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from config import subject_model_save_path
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from config import subject_all_user_item_feats
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from config import subject_rank_dense_fea
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from config import subject_rank_sparse_fea
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from config import subject_rank_feats_columns
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from config import logger
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from matching.subject.recall_comm import get_item_info_df
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os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
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os.environ["CUDA_VISIBLE_DEVICES"] = "1"
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K.set_learning_phase(True)
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if tf.__version__ >= '2.0.0':
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tf.compat.v1.disable_eager_execution()
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tqdm.pandas()
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warnings.filterwarnings('ignore')
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# 加这几行避免训练报错
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config = ConfigProto()
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config.gpu_options.allow_growth = True
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session = InteractiveSession(config=config)
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def get_difm_feats_columns(df, dense_fea, sparse_fea, emb_dim=32):
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"""
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数据准备函数:
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df: 数据集
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dense_fea: 数值型特征列
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sparse_fea: 离散型特征列
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"""
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fixlen_feature_columns = [SparseFeat(feat, vocabulary_size=df[feat].max() + 1, embedding_dim=emb_dim)
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for i, feat in enumerate(sparse_fea)] + [DenseFeat(feat, 1, )
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for feat in dense_fea]
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dnn_feature_columns = fixlen_feature_columns
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linear_feature_columns = fixlen_feature_columns
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feature_names = get_feature_names(linear_feature_columns + dnn_feature_columns)
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x = {}
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x = {name: df[name].values for name in feature_names}
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return x, linear_feature_columns, dnn_feature_columns
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if __name__ == '__main__':
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logger.info('获取物品信息')
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subject_info_df = get_item_info_df()
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# 课程总数量
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subjects_count = len(subject_info_df['subject_id'].unique().tolist())
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logger.info('加载用户行为特征')
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# 所有用户物品特征
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all_user_item_feats_df = pd.read_csv(subject_all_user_item_feats, sep='\t', encoding='utf-8')
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train_user_item_feats_df = pd.read_csv(subject_train_user_item_feats, sep='\t', encoding='utf-8')
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train_user_item_feats_df['subject_id'] = train_user_item_feats_df['subject_id'].astype(int)
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if offline_mode:
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val_user_item_feats_df = pd.read_csv(subject_val_user_item_feats, sep='\t', encoding='utf-8')
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val_user_item_feats_df['subject_id'] = val_user_item_feats_df['subject_id'].astype(int)
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else:
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val_user_item_feats_df = None
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test_user_item_feats_df = pd.read_csv(subject_test_user_item_feats, sep='\t', encoding='utf-8')
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test_user_item_feats_df['subject_id'] = test_user_item_feats_df['subject_id'].astype(int)
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# 做特征的时候为了方便，给测试集也打上了一个无效的标签，这里直接删掉就行
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del test_user_item_feats_df['label']
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# 把特征分开
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sparse_fea = subject_rank_sparse_fea
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dense_fea = subject_rank_dense_fea
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train_user_item_feats_df[dense_fea] = train_user_item_feats_df[dense_fea].fillna(0, )
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if val_user_item_feats_df is not None:
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val_user_item_feats_df[dense_fea] = val_user_item_feats_df[dense_fea].fillna(0, )
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test_user_item_feats_df[dense_fea] = test_user_item_feats_df[dense_fea].fillna(0, )
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# dense特征进行归一化
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for feat in dense_fea:
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min_max_scaler = MinMaxScaler()
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min_max_scaler.fit((all_user_item_feats_df[[feat]]))
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pickle.dump(min_max_scaler, open(subject_model_save_path + 'min_max_scaler_' + feat + '.model', 'wb'))
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train_user_item_feats_df[feat] = min_max_scaler.transform(train_user_item_feats_df[[feat]])
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if val_user_item_feats_df is not None:
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val_user_item_feats_df[feat] = min_max_scaler.transform(val_user_item_feats_df[[feat]])
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test_user_item_feats_df[feat] = min_max_scaler.transform(test_user_item_feats_df[[feat]])
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# sparse特征进行LabelEncoder
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for feat in sparse_fea:
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label_encoder = LabelEncoder()
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if feat == 'subject_id':
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label_encoder.fit(subject_info_df[[feat]])
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subject_id_lable_encoder = label_encoder
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else:
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label_encoder.fit(all_user_item_feats_df[[feat]])
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if feat == 'user_id':
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user_id_label_encoder = label_encoder
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pickle.dump(label_encoder, open(subject_model_save_path + feat + '_label_encoder.model', 'wb'))
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train_user_item_feats_df[feat] = label_encoder.transform(train_user_item_feats_df[[feat]])
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if val_user_item_feats_df is not None:
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val_user_item_feats_df[feat] = label_encoder.transform(val_user_item_feats_df[[feat]])
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test_user_item_feats_df[feat] = label_encoder.transform(test_user_item_feats_df[[feat]])
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# 准备训练数据
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x_train, linear_feature_columns, dnn_feature_columns = get_difm_feats_columns(
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train_user_item_feats_df, dense_fea, sparse_fea)
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y_train = train_user_item_feats_df['label'].values
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if val_user_item_feats_df is not None:
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# 准备验证数据
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x_val, linear_feature_columns, dnn_feature_columns = get_difm_feats_columns(
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val_user_item_feats_df, dense_fea, sparse_fea)
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y_val = val_user_item_feats_df['label'].values
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dense_fea = [x for x in dense_fea if x != 'label']
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x_test, linear_feature_columns, dnn_feature_columns = get_difm_feats_columns(
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test_user_item_feats_df, dense_fea, sparse_fea)
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model = DIFM(linear_feature_columns, dnn_feature_columns, task='binary')
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model.summary()
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model.compile(optimizer="Adam",
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loss=tf.keras.losses.BinaryCrossentropy(from_logits=True),
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metrics=['AUC']#评价指标：AUC,精确度，均方误差
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)
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# 模型训练
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if val_user_item_feats_df is not None:
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history = model.fit(x_train,
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y_train,
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verbose=1,
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epochs=5,
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validation_data=(x_val, y_val),
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batch_size=256)
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else:
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# 也可以使用下面的语句用自己采样出来的验证集
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history = model.fit(x_train,
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y_train,
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verbose=1,
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epochs=5,
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validation_split=0.3,
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batch_size=256)
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# 保存训练好的DIFM模型
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save_model(model, subject_model_save_path + 'difm_model.h5')
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# 模型预测
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test_user_item_feats_df['pred_score'] = model.predict(x_test, verbose=1, batch_size=256)
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# 还原user_id和subject_id
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test_user_item_feats_df['user_id'] = user_id_label_encoder.inverse_transform(test_user_item_feats_df[['user_id']])
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test_user_item_feats_df['subject_id'] = subject_id_lable_encoder.inverse_transform(test_user_item_feats_df[['subject_id']])
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item_info_df = get_item_info_df()
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item_info_df = item_info_df[['subject_id', 'subject_name']]
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test_user_item_feats_df = test_user_item_feats_df.merge(item_info_df, how='left', on='subject_id')
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test_user_item_feats_df.sort_values(by=['user_id', 'pred_score'], ascending=[True, False], inplace=True)
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test_user_item_feats_df['pred_rank'] = test_user_item_feats_df.groupby(['user_id'])['pred_score'].rank(ascending=False, method='first').astype(int)
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for feat in subject_rank_feats_columns:
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min_max_scaler = pickle.load(open(subject_model_save_path + 'min_max_scaler_' + feat + '.model', 'rb'))
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train_user_item_feats_df[feat] = min_max_scaler.inverse_transform(train_user_item_feats_df[[feat]])
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if val_user_item_feats_df is not None:
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val_user_item_feats_df[feat] = min_max_scaler.inverse_transform(val_user_item_feats_df[[feat]])
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test_user_item_feats_df[feat] = min_max_scaler.inverse_transform(test_user_item_feats_df[[feat]])
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test_user_item_feats_df[['user_id', 'subject_id', 'subject_name'] + subject_rank_feats_columns + ['pred_score', 'pred_rank']].to_csv(
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subject_features_save_path + 'difm_rank_score.csv', sep='\t', index=False, header=True) |
