$ python
Python 2.7.18 |Anaconda, Inc.| (default, Apr 23 2020, 22:42:48)
[GCC 7.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> s='123s_s'
>>> s.rstrip('_s')
'123'


为啥会这样

_是保留字符吗？
--
FROM 119.139.199.*