python - AttributeError：“str”对象没有属性“strftime”

Question

我正在使用以下代码以特定格式使用日期并遇到以下错误..如何以 m/d/y 格式输入日期？

from datetime import datetime, date

def main ():
    cr_date = '2013-10-31 18:23:29.000227'
    crrdate = cr_date.strftime(cr_date,"%m/%d/%Y")

if __name__ == '__main__':
    main()

错误：-

AttributeError: 'str' object has no attribute 'strftime'

Answer 1

You should use datetime object, not str.

>>> from datetime import datetime
>>> cr_date = datetime(2013, 10, 31, 18, 23, 29, 227)
>>> cr_date.strftime('%m/%d/%Y')
'10/31/2013'

To get the datetime object from the string, use datetime.datetime.strptime:

>>> datetime.strptime(cr_date, '%Y-%m-%d %H:%M:%S.%f')
datetime.datetime(2013, 10, 31, 18, 23, 29, 227)
>>> datetime.strptime(cr_date, '%Y-%m-%d %H:%M:%S.%f').strftime('%m/%d/%Y')
'10/31/2013'

Answer 2

您应该将 cr_date(str) 更改为 datetime 对象，然后将日期更改为特定格式：

cr_date = '2013-10-31 18:23:29.000227'
cr_date = datetime.datetime.strptime(cr_date, '%Y-%m-%d %H:%M:%S.%f')
cr_date = cr_date.strftime("%m/%d/%Y")