那些记不住的api

当然可以现查,但难免落入造轮子的悲剧;kengchi kengchi在那搞了半天,

后来发现内置的就有...

1.字符串

>>> ‘a‘.zfill(3)
‘00a‘
>>> ‘abdef‘.partition(‘b‘)
(‘a‘, ‘b‘, ‘def‘)
>>> ‘abdef‘.rpartition(‘b‘)
(‘a‘, ‘b‘, ‘def‘)
>>> ‘a‘.center(10,‘*‘)
‘****a*****‘
>>> tmp="""abc def
def
defef fff         s"""
>>> tmp.splitlines()   #读文件后干过很多次 splinline(‘\r\n‘)
[‘abc def‘, ‘def‘, ‘defef fff \t\ts‘]
>>> ‘sd\td‘.expandtabs()
‘sd      d‘