train_path="/kaggle/input/kedaxunfei/用户新增预测挑战赛公开数据/train.csv"train_df=pd.read_csv(train_path)print(f"len(train_df):{len(train_df)}")train_df.head() 读取测试数据. test_path="/kaggle/input/kedaxunfei/用户新增预测挑战赛公开数据/test.csv"test_df=pd.read_csv(test_path)print...