关于 SO 问题 904928 (Python strftime - date without leading 0?)瑞恩回答:
Actually I had the same problem and I realised that, if you add a hyphen between the % and the letter, you can remove the leading zero.
For example %Y/%-m/%-d.
我遇到了同样的问题,这是一个很好的解决方案,但是,为什么会这样?
>>> import datetime
>>> datetime.datetime(2015, 3, 5).strftime('%d')
'05'
>>> datetime.datetime(2015, 3, 5).strftime('%-d')
'5'
# It also works with a leading space
>>> datetime.datetime(2015, 3, 5).strftime('%e')
' 5'
>>> datetime.datetime(2015, 3, 5).strftime('%-e')
'5'
# Of course other numbers doesn't get stripped
>>> datetime.datetime(2015, 3, 15).strftime('%-e')
'15'
我找不到任何相关文档? -> python datetime docs/python string operations
这似乎在 windows 机器上不起作用,我不使用 windows,但知道为什么它不起作用会很有趣?
最佳答案
Python datetime.strftime()
delegates to C strftime()
function that is platform-dependent :
The full set of format codes supported varies across platforms, because Python calls the platform C library’s strftime() function, and platform variations are common. To see the full set of format codes supported on your platform, consult the strftime(3) documentation.
- (dash) Do not pad a numeric result string.
我的 Ubuntu 机器上的结果:
>>> from datetime import datetime
>>> datetime.now().strftime('%d')
'07'
>>> datetime.now().strftime('%-d')
'7'
关于python - 为什么 "%-d"或 "%-e"删除前导空格或零?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28894172/