Content-Type: text/x-zim-wiki
Wiki-Format: zim 0.4
Creation-Date: 2012-10-04T13:20:41+08:00

====== str ======
Created Thursday 04 October 2012

 |  join(...)
 |      S.join(iterable) -> string
 |      
 |      Return a string which is the concatenation of __the strings in the__
__ |      iterable__.  The separator between elements is S.

iterable迭代器对象每次返回的__必须是字符串对象__。

>>> ":".join("abcd")
'a:b:c:d'

>>> ":".join(['a','b','c','d'])
'a:b:c:d'

>>> ":".join(['a',__123__,'c'])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: sequence item 1: __expected string__, int found

>>> ":".join(['a',['ab'],'c'])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: sequence item 1: expected string, list found
>>> 

 |  rsplit(...)
 |      S.rsplit([sep [,maxsplit]]) -> list of strings
 |      
 |      Return a list of the words in the string S, using sep as the
 |      delimiter string, starting at the end of the string and working
 |      to the front.  If maxsplit is given, at most maxsplit splits are
 |      done. If sep is not specified or is __None__, any whitespace string
 |      is a separator.