python-3.x - 我如何从 Pandas 的时间戳中提取星期几

Question

我在数据框中有时间戳列，如下所示，我想创建另一列名为 day of week从那。怎么办

Input

 Pickup date/time    
07/05/2018 09:28:00                     
14/05/2018 17:00:00                      
15/05/2018 17:00:00                      
15/05/2018 17:00:00                     
23/06/2018 17:00:00                     
29/06/2018 17:00:00  

预期产出

Pickup date/time      Day of Week
07/05/2018 09:28:00     Monday                
14/05/2018 17:00:00     Monday                  
15/05/2018 17:00:00     Tuesday                 
15/05/2018 17:00:00     Tuesday               
23/06/2018 17:00:00     Saturday              
29/06/2018 17:00:00     Friday

Answer 1

您可以使用 weekday_name

df['date/time'] = pd.to_datetime(df['date/time'], format = '%d/%m/%Y %H:%M:%S')

df['Day of Week'] = df['date/time'].dt.weekday_name

你得到

    date/time   Day of Week
0   2018-05-07 09:28:00 Monday
1   2018-05-14 17:00:00 Monday
2   2018-05-15 17:00:00 Tuesday
3   2018-05-15 17:00:00 Tuesday
4   2018-06-23 17:00:00 Saturday
5   2018-06-29 17:00:00 Friday

编辑:

对于较新版本的 Pandas，请使用 day_name()，

df['Day of Week'] = df['date/time'].dt.day_name()