分享一篇Python中字符串函数 （partition）详解

partition(...)
    S.partition(sep) -> (head, sep, tail)
    
    Search for the separator sep in S, and return the part before it,
    the separator itself, and the part after it.  If the separator is not
    found, return S and two empty strings.

>>> a = 'changzhi1990'
>>> a.rpartition('h')
('changz', 'h', 'i1990')

>>> a = 'changzhi1990'
>>> a.partition('h')
('c', 'h', 'angzhi1990')