减去日期时间（格式 %h %m %s）

Question

我有这个数据框：

Product   Start Time            End Time
   A      2021-02-03 00:07:43   2021-02-03 00:42:53.000000000   
   B      2021-02-03 00:11:15   2021-02-03 00:13:55.000000000   
   C      2021-02-03 00:13:16   2021-02-03 00:13:16.000000000   
   D      2021-02-03 00:16:48   2021-02-03 00:21:52.000000000   
   E      2021-02-03 00:17:11   2021-02-03 00:31:31.000000000          

我需要在两个日期时间列之间进行减法。

df['duration'] = ((df['End time']) - (df['Start Solicitud']))

结果是：

0        0 days 00:02:38
1        0 days 00:02:38
2        0 days 00:02:38
3        0 days 00:02:38
4        0 days 00:02:38

我需要格式

0        00:02:38
1        00:02:38
2        00:02:38
3        00:02:38
4        00:02:38