首页 > 编程语言 > 详细

Python中字符串操作函数string.split('str1')和string.join(ls)

时间:2019-03-22 19:20:16      阅读:272      评论:0      收藏:0      [点我收藏+]

  Python中的字符串操作函数split 和 join能够实现字符串和列表之间的简单转换,

  使用 .split()可以将字符串中特定部分以多个字符的形式,存储成列表

 1     def split(self, *args, **kwargs): # real signature unknown
 2         """
 3         Return a list of the words in the string, using sep as the delimiter string.
 4         
 5           sep
 6             The delimiter according which to split the string.
 7             None (the default value) means split according to any whitespace,
 8             and discard empty strings from the result.
 9           maxsplit
10             Maximum number of splits to do.
11             -1 (the default value) means no limit.
12         """
13         pass

如上所说,split()函数,使用字符串中的字符作为分隔符(sep),返回字符串分词的列表(不含有作为分隔符的字符),如果分隔符为None,则以字符串中的空格作为分隔符;同时还可以传入一个int参数

作为分隔的次数,(默认值 为 -1,不限制次数)

eg:

>>>:s = Process finished with exit code 0
>>>:s.split()# sep:None;maxsplit:-1.空格作为分隔符,分隔所有 [Process, finished, with, exit, code, 0] >>>:s.split(i)#sep:‘i’;maxsplit:-1.‘i’作为分隔符,分割所有 [Process f, n, shed w, th ex, t code 0] >>>:s.split(i, 2)#sep:‘i’;maxsplit:2.‘i’作为分隔符,分割两次 [Process f, n, shed with exit code 0]

 

再进一步:

>>>:s = Process finished with exiiit code 0

>>>:s.split(i)
[Process f, n, shed w, th ex, ‘‘, ‘‘, t   code 0]

  使用join()可以将列表中的字符串类型数据,组合成一个字符串:

 1     def join(self, ab=None, pq=None, rs=None): # real signature unknown; restored from __doc__
 2         """
 3         Concatenate any number of strings.
 4         
 5         The string whose method is called is inserted in between each given string.
 6         The result is returned as a new string.
 7         
 8         Example: ‘.‘.join([‘ab‘, ‘pq‘, ‘rs‘]) -> ‘ab.pq.rs‘
 9         """
10         pass

如上所说连接任意数量的字符串,将字符串插入到被调用的两两字符串间,返回一个新的字符串。

 

总结:

s = abcdabcd

ls = s.split(c)

s2 = c.join(ls)

s = s2

上面利用两个函数互相转化,使用split()由字符串得到新列表,再使用join()由列表得到新字符串,

技术分享图片

 

Python中字符串操作函数string.split('str1')和string.join(ls)

原文:https://www.cnblogs.com/wangwenhao072093/p/10580414.html

(0)
(0)
   
举报
评论 一句话评论(0
关于我们 - 联系我们 - 留言反馈 - 联系我们:wmxa8@hotmail.com
© 2014 bubuko.com 版权所有
打开技术之扣,分享程序人生!