qq_22667507的博客

#way1: 列表加索引person_n = [i for i in range(1,101)]fortune = pd.DataFrame([100 for i in range(100)],index = person_n)

#merge()pd.merge(da_q2,da_q3,left_on = '整理后剧名',right_index = True)

-改变列的数据类型：data_1[‘date’] = data_1[‘date’].astype(np.str)data_1[‘date’] = pd.to_datetime(data_1[‘date’])- 删除值：data_1 = data_1.drop_duplicates() 删除重复值data_1.fillna(value,axis = 1) 填充缺失值查看信息：data_1.info()data_1.describe()data_1.dtypes查看dataframe中的行和

dataframe取一行或者一列：取列：dataframe[i]取行：dataframe.iloc[i]