小编and*_*son的帖子

一直在处理在datetime,Timestamp和datetime64之间转换中列出的选项; 但是,numpy的isnat()似乎无法识别日期时间对象,或者我错过了函数输入所需的其他类型的日期时间对象.

以下是数据框的概述:

>>> time_data.head()
     Date          Name               In AM              Out AM  \
0  2017-12-04  AUSTIN LEWIS 1900-01-01 07:03:11 1900-01-01 12:01:50   
1  2017-12-05  AUSTIN LEWIS 1900-01-01 05:24:07 1900-01-01 12:08:21   
2  2017-12-06  AUSTIN LEWIS 1900-01-01 11:58:32                 NaT   
3  2017-12-07  AUSTIN LEWIS 1900-01-01 08:31:23 1900-01-01 12:49:51   
4  2017-12-11  AUSTIN LEWIS 1900-01-01 06:55:21 1900-01-01 12:02:08   

            In PM              Out PM Sick Time  
0 1900-01-01 12:28:52 1900-01-01 17:34:53       NaT  
1 1900-01-01 12:35:12 1900-01-01 16:15:17       NaT  
2                 NaT 1900-01-01 23:59:01       NaT  
3 1900-01-01 13:18:34 1900-01-01 …