特征工程优化

train/train_service2.py

+import tensorflow as tf
+import json
+import pandas as pd
+import time
+import sys
+import os
+
+sys.path.append(os.path.dirname(os.path.abspath(os.path.dirname(__file__))))
+import utils.connUtils as connUtils
+import utils.configUtils as configUtils
+
+ITEM_NUMBER_COLUMNS = ["item_"+c for c in ["smart_rank2"]]
+embedding_columns = ["itemid","userid"] + ["item_"+c for c in ["doctor_id","hospital_id"]]
+multi_columns = ["tags_v3","first_demands","second_demands","first_solutions","second_solutions","first_positions","second_positions"]
+one_hot_columns = ["item_"+c for c in ["service_type","doctor_type","doctor_famous","hospital_city_tag_id","hospital_type","hospital_is_high_quality"]]
+# history_columns = ["userRatedHistory"]
+
+# 数据加载
+# data_path_train = "/Users/zhigangzheng/Desktop/work/guoyu/service_sort/train/part-00000-a61205d1-ad4e-4fa7-895d-ad8db41189e6-c000.csv"
+# data_path_test = "/Users/zhigangzheng/Desktop/work/guoyu/service_sort/train/part-00000-a61205d1-ad4e-4fa7-895d-ad8db41189e6-c000.csv"
+
+VERSION = configUtils.SERVICE_VERSION
+trainDay = time.strftime("%Y%m%d%H", time.localtime())
+data_path_train = "/data/files/service_feature_{}_train.csv".format(VERSION)
+data_path_test = "/data/files/service_feature_{}_test.csv".format(VERSION)
+model_file = "/srv/apps/tensorServing_models/test/service/" + trainDay
+
+def is_float(s):
+    try:
+        float(s)
+        return True
+    except ValueError:
+        return False
+
+#数据字典
+def getDataVocabFromRedis(version):
+    conn = connUtils.getRedisConn()
+    key = "Strategy:rec:vocab:service:"+version
+    dataVocabStr = conn.get(key)
+    if dataVocabStr:
+        dataVocab = json.loads(str(dataVocabStr, encoding="utf-8"),encoding='utf-8')
+        print("-----data_vocab-----")
+        for k, v in dataVocab.items():
+            print(k, len(v))
+    else:
+        dataVocab = None
+
+    return dataVocab
+
+# 数据类型转换
+def csvTypeConvert(columns,df,data_vocab):
+    df["label"] = df["label"].astype("int")
+    for k in columns:
+        # 离散na值填充
+        if data_vocab.get(k):
+            df[k] = df[k].fillna("-1")
+            df[k] = df[k].astype("string")
+        elif k != "label":
+            # df[k] = df[k].map(lambda x:x if is_float(x) else 0)
+            df[k] = df[k].fillna(0)
+            df[k] = df[k].astype("float")
+    # print(df.dtypes)
+    return df
+
+def loadData(data_path):
+    print("读取数据...")
+    timestmp1 = int(round(time.time() * 1000))
+    df = pd.read_csv(data_path, sep="|")
+    timestmp2 = int(round(time.time() * 1000))
+    print("读取数据耗时ms:{}".format(timestmp2 - timestmp1))
+    return df
+
+
+def getDataSet(df,shuffleSize = 10000,batchSize=128):
+    # print(df.dtypes)
+    labels = df.pop('label')
+    dataSet = tf.data.Dataset.from_tensor_slices((dict(df), labels)).shuffle(shuffleSize).batch(batchSize)
+    return dataSet
+
+def getTrainColumns(train_columns,data_vocab):
+    emb_columns = []
+    number_columns = []
+    oneHot_columns = []
+    dataColumns = []
+    inputs = {}
+    # 离散特征
+    for feature in train_columns:
+        if data_vocab.get(feature):
+            if feature.count("__")>0:
+                cat_col = tf.feature_column.categorical_column_with_vocabulary_list(key=feature,vocabulary_list=data_vocab[feature])
+                col = tf.feature_column.embedding_column(cat_col, 5)
+                emb_columns.append(col)
+                dataColumns.append(feature)
+                inputs[feature] = tf.keras.layers.Input(name=feature, shape=(), dtype='string')
+            elif feature in one_hot_columns or feature.count("Bucket") > 0:
+                cat_col = tf.feature_column.categorical_column_with_vocabulary_list(key=feature, vocabulary_list=data_vocab[feature])
+#                 col = tf.feature_column.indicator_column(cat_col)
+                col = tf.feature_column.embedding_column(cat_col, 3)
+                oneHot_columns.append(col)
+                dataColumns.append(feature)
+                inputs[feature] = tf.keras.layers.Input(name=feature, shape=(), dtype='string')
+            else:
+                cat_col = tf.feature_column.categorical_column_with_vocabulary_list(key=feature,vocabulary_list=data_vocab[feature])
+                col = tf.feature_column.embedding_column(cat_col, 10)
+                emb_columns.append(col)
+                dataColumns.append(feature)
+                inputs[feature] = tf.keras.layers.Input(name=feature, shape=(), dtype='string')
+
+        elif feature in ITEM_NUMBER_COLUMNS:
+            col = tf.feature_column.numeric_column(feature)
+            number_columns.append(col)
+            dataColumns.append(feature)
+            inputs[feature] = tf.keras.layers.Input(name=feature, shape=(), dtype='float32')
+
+    return emb_columns,number_columns,oneHot_columns,dataColumns,inputs
+
+
+def train(emb_columns, number_columns, oneHot_columns, inputs, train_dataset):
+    wide = tf.keras.layers.DenseFeatures(emb_columns + number_columns + oneHot_columns)(inputs)
+    deep = tf.keras.layers.Dense(64, activation='relu')(wide)
+    deep = tf.keras.layers.Dropout(0.2)(deep)
+    # concat_layer = tf.keras.layers.concatenate([wide, deep], axis=1)
+
+    deep = tf.keras.layers.Dense(64, activation='relu')(deep)
+    deep = tf.keras.layers.Dropout(0.5)(deep)
+    output_layer = tf.keras.layers.Dense(1, activation='sigmoid')(deep)
+
+    model = tf.keras.Model(inputs, output_layer)
+
+    # compile the model, set loss function, optimizer and evaluation metrics
+    model.compile(
+        loss='mse',
+        optimizer='adam',
+        metrics=['accuracy', tf.keras.metrics.AUC(curve='ROC'), tf.keras.metrics.AUC(curve='PR')])
+
+    # train the model
+    print("train start...")
+    model.fit(train_dataset, epochs=5)
+    print("train end...")
+    print("train save...")
+
+    model.save(model_file, include_optimizer=False, save_format='tf')
+    return model
+
+
+def evaluate(model,test_dataset):
+    if not model:
+        print("加载模型中")
+        model = tf.keras.models.load_model(model_file)
+    # evaluate the model
+    timestmp1 = int(round(time.time()))
+    print("evaluate:")
+    test_loss, test_accuracy, test_roc_auc, test_pr_auc = model.evaluate(test_dataset)
+    print('\n\nTest Loss {}, Test Accuracy {}, Test ROC AUC {}, Test PR AUC {}'.format(test_loss, test_accuracy,
+                                                                                       test_roc_auc, test_pr_auc))
+    print("验证耗时s:", int(round(time.time())) - timestmp1)
+
+
+def predict(model_path,df):
+    print("加载模型中...")
+    model_new = tf.keras.models.load_model(model_path)
+    # model_new.summary()
+    print("模型加载完成...")
+    # model = tf.keras.models.model_from_json(model.to_json)
+    n = 1000
+    dd = dict(df.sample(n=n))
+    for i in range(10):
+        timestmp1 = int(round(time.time() * 1000))
+        model_new.predict(dd, batch_size=10000)
+        print("测试样本数：{},测试耗时ms:{}".format(n, int(round(time.time() * 1000)) - timestmp1))
+
+
+
+if __name__ == '__main__':
+
+    curTime = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
+    print("train_service执行时间:{}".format(curTime))
+
+    # redis中加载数据字典
+    print("redis 中加载模型字典...")
+    data_vocab = getDataVocabFromRedis(VERSION)
+    assert data_vocab
+
+    print("读取数据...")
+    timestmp1 = int(round(time.time()))
+    df_train = loadData(data_path_train)
+    # df_test = loadData(data_path_test)
+    timestmp2 = int(round(time.time()))
+    print("读取数据耗时s:{}".format(timestmp2 - timestmp1))
+
+    # 获取训练列
+    columns = df_train.columns.tolist()
+    print("原始数据列：")
+    print(columns)
+    emb_columns,number_columns,oneHot_columns, datasColumns,inputs = getTrainColumns(columns, data_vocab)
+    print("训练列：")
+    print(datasColumns)
+
+    df_train = df_train[datasColumns + ["label"]]
+    # df_test = df_test[datasColumns + ["label"]]
+
+    trainSize = df_train["label"].count()
+    print("trainSize:{}".format(trainSize))
+    # testSize = df_test["label"].count()
+    # print("trainSize:{},testSize{}".format(trainSize,testSize))
+
+    # 数据类型转换
+    df_train = csvTypeConvert(datasColumns,df_train,data_vocab)
+    # df_test = csvTypeConvert(datasColumns,df_test,data_vocab)
+
+    # 获取训练数据
+    train_data = getDataSet(df_train,shuffleSize=trainSize,)
+    # test_data = getDataSet(df_test,shuffleSize=testSize)
+
+
+    print("train start...")
+    timestmp3 = int(round(time.time()))
+    model = train(emb_columns,number_columns,oneHot_columns,inputs,train_data)
+    timestmp4 = int(round(time.time()))
+    print("train end...耗时h:{}".format((timestmp4 - timestmp3)/60/60))
+
+    # evaluate(model,test_data)
+
+
+    # predict(model_file,test_data)
+
+    pass
+