轻松python文本专题-字符串开头或者结尾匹配

标签：python

场景：

字符串开头或者结尾匹配，一般是使用在匹配文件类型或者url

一般使用startwith或者endwith

>>> a='http://blog.csdn.net/raylee2007'
>>> a.startswith ('http')
True

>>> a='http://blog.csdn.net/raylee2007'
>>> a.startswith (('http','ftp'))
True

如果是列表或者字典，则报错

>>> a='http://blog.csdn.net/raylee2007'
>>> a.startswith (['http','ftp'])
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    a.startswith (['http','ftp'])
TypeError: startswith first arg must be str or a tuple of str, not list
>>> 

>>> a='http://blog.csdn.net/raylee2007'
>>> a[0:4]=='http'
True
>>> 

>>> import re
>>> url = 'http://www.python.org'
>>> re.match('http:|https:|ftp:', url)
<_sre.SRE_Match object; span=(0, 5), match='http:'>
>>> help(re.match )
Help on function match in module re:

match(pattern, string, flags=0)
    Try to apply the pattern at the start of the string, returning
    a match object, or None if no match was found.

>>> 

就说到这里，谢谢大家

------------------------------------------------------------------

点击跳转零基础学python-目录

轻松python文本专题-字符串开头或者结尾匹配

标签：python

原文地址：http://blog.csdn.net/raylee2007/article/details/48036143