我有两个数据帧df和df1，我想根据日期合并，也基于Id列，
df看起来像
| arrival | input_fid | 01-01-2021 | 719 |
|---|---|
| 02-01-2021 | 719 |
| 02-01-2021 | 599 |
| 02-01-2021 | 599 |
| 02-01-2021 | 479 |
| 01-01-2021 | 359 |
| 04-01-2021 | 359 |
merge_df = pd.merge(df1 , df2, how='inner', left_on=['arrival','input_fid'], right_on = ['arrival','input_fid'])