rov-offline/ad_xgboost_predict.py

import pandas as pd
import xgboost as xgb
from xgboost.sklearn import XGBClassifier
from utils import RedisHelper
from config import set_config
redis_helper = RedisHelper()
config_, _ = set_config()


def predict(app_type):
    # 1. 模型加载
    model = XGBClassifier()
    booster = xgb.Booster()
    booster.load_model('./data/ad_xgb.model')
    model._Booster = booster

    # 2. 预测：ad_status = 0, 不出广告
    df_0 = pd.read_csv('./data/predict_data/predict_data_0.csv')
    columns_0 = df_0.columns.values.tolist()
    columns_0.remove('videoid')
    y_pred_proba_0 = model.predict_proba(df_0[columns_0[2:]])
    df_0['y_0'] = [x[1] for x in y_pred_proba_0]
    pre_df_0 = df_0[['apptype', 'mid', 'videoid', 'y_0']].copy()

    # 3. 预测：ad_status = 1, 不出广告
    df_1 = pd.read_csv('./data/predict_data/predict_data_1.csv')
    columns_1 = df_1.columns.values.tolist()
    columns_1.remove('videoid')
    y_pred_proba_1 = model.predict_proba(df_1[columns_1[2:]])
    df_1['y_1'] = [x[1] for x in y_pred_proba_1]
    pre_df_1 = df_1[['apptype', 'mid', 'videoid', 'y_1']].copy()

    # 4. merge 结果
    res_df = pd.merge(pre_df_0, pre_df_1, how='left', on=['apptype', 'mid', 'videoid'])
    res_df['res_predict'] = res_df['y_0'] - res_df['y_1']
    print(res_df.head())

    # 5. to csv
    res_df.to_csv('./data/predict_data/predict_res.csv', index=False)
    print("to csv finished!")

    xgb_config = config_.AD_MODEL_ABTEST_CONFIG['xgb']
    # 6. to redis
    for ind, row in res_df.iterrows():
        app_type = row['apptype']
        mid = row['mid']
        video_id = row['videoid']
        pre_res = row['res_predict']
        key = f"{xgb_config['predict_key_prefix']}{app_type}:{mid}:{video_id}"
        redis_helper.set_data_to_redis(key_name=key, value=pre_res, expire_time=48*3600)
    print("to redis finished!")

    # 7. 计算阈值
    # 获取对应实验id
    abtest_id_mapping = xgb_config['abtest_id_mapping']
    abtest_id = abtest_id_mapping[app_type]
    # 获取阈值参数记录
    threshold_record = redis_helper.get_data_from_redis(key_name=xgb_config['threshold_record'])
    threshold_record = eval(threshold_record)
    record = threshold_record[abtest_id]
    # 分实验组进行阈值计算
    predict_mean = res_df['res_predict'].mean()
    for ab_code, param in record.items():
        threshold = predict_mean * param
        # 写入redis
        threshold_key = f"{xgb_config['threshold']}{abtest_id}{ab_code}"
        redis_helper.set_data_to_redis(key_name=threshold_key, value=threshold, expire_time=48 * 3600)
    print("update threshold finished!")


if __name__ == '__main__':
    predict(config_.APP_TYPE['VLOG'])