python字符串操作

>>> s=" 333 "
>>> s.strip()
'333'
>>> s=" 555 "
>>> s.lstrip()
'555 '
>>> s.rstrip()
' 555'
>>> s=" 5,9, "
>>> s.rstrip(",")
' 5,9, '
>>> a="abc"
>>> b="adfabcddd"
>>> a in b
True
>>> max("asdf")
's'
>>> min("dasfasdf")
'a'
>>> a="abc1"
>>> a*3
'abc1abc1abc1'