Question

我有一个已编写的脚本，我需要更改日期，当脚本运行时输出此消息

output_messaging("*** DATA REFRESH FOR STREETWORKS DATA EXECUTED ON " + 
    str(datetime.date.today().day) + "/" + str(datetime.date.today().month) + "/" +            
    str(datetime.date.today().year) + " AT " + str(datetime.datetime.now().hour) + ':' +   
    str(datetime.datetime.now().minute) + ':' + str(datetime.datetime.now().second) + " ***\n\n")

哪个给出了

*** DATA REFRESH FOR STREETWORKS DATA EXECUTED ON 20/2/2012 AT 18:3 ***

我需要转换为

的日期

20/Feb/2012，我该怎么做？

Answer 1

output_messaging("*** DATA REFRESH FOR STREETWORKS DATA EXECUTED ON {0:%d/%b/%Y} AT {0:%H:%M} ***".format(datetime.datetime.now()))

打印

*** DATA REFRESH FOR STREETWORKS DATA EXECUTED ON 28/Feb/2012 AT 17:41 ***

More information about datetime formatting

Answer 2

使用strftime - 这比做一堆自定义连接更容易。有一个格式约定表here。

>>> s = "*** DATA REFRESH FOR STREETWORKS DATA EXECUTED ON "\
...     "%d/%b/%y AT %H:%M:%S ***\n\n"
>>> datetime.datetime.now().strftime(s)
'*** DATA REFRESH FOR STREETWORKS DATA EXECUTED ON 28/Feb/12 AT 11:44:03 ***\n\n'

正如eumiro的回答所示，您也可以使用稍微修改过的格式字符串来反转上述调用，如下所示：

>>> s = "*** DATA REFRESH FOR STREETWORKS DATA EXECUTED ON "\
...     "{0:%d/%b/%y} AT {0:%H:%M:%S} ***\n\n"
>>> s.format(datetime.datetime.now())
'*** DATA REFRESH FOR STREETWORKS DATA EXECUTED ON 28/Feb/12 AT 13:41:10 ***\n\n'

这是有效的，因为format只是调用__format__对象的（令人震惊的记录不足）datetime.datetime方法。例如：

>>> datetime.datetime.now().__format__('The current month is %B')
'The current month is February'

这适用于其他类型：

>>> (16).__format__('x')
'10'

有关__format__的更多信息，请参阅PEP 3101

Answer 3

>>> from datetime import date
>>> day = date.today()
>>> day.strftime('%d/%b/%y')
'28/Feb/12'

Answer 4

import datetime
print datetime.datetime.now().strftime('%d/%b/%Y')
# 28/Feb/2012

如何在python中将日期转换为日/月/年（2012年1月20日）

4 个答案: