Python正则表达式在使用的时候需要注意很多问题，相关的Python正则表达式问题如只有不断的学习才能更好的进行解决。下面我们就看看如何才能更好的学习。希望大家有所收获。
Java代码
- #encoding=utf-8
- '''
- python learn regular express
- url : http://docs.python.org/library/re.html
- parse html url : http://www.boddie.org.uk/python/HTML.html
- author : liuzheng
- '''
- import re
- import urllib
- #分析javaeye blog 频道
- class ParseHTML:
- '''
- parse html for infomation
- parse javeeye page
- '''
- def __init__(self,url):
- self.url = url
- pass
- #analyses html
- def parse(self):
- sock = urllib.urlopen(self.url)
- html = sock.read()
- self.__puts(html)
- pass
- #打印html 匹配数据
- def __puts(self,html):
- b = re.compile(r"<a href='([\w./:\\]+?)'[\s]*title=([^<>]+?)
[\s]*target=([^<>]+?)>([^<>]+?)</a>",re.I)- m = re.findall(b,html)
- #这里有encode 问题？，不知道，大家是否可以帮忙解答
- print m
- if __name__ == '__main__':
- url = "http://www.javaeye.com/blogs"
- p = ParseHTML(url)
- p.parse()
- if __debug__:
- print "debuging is %s" % __debug__
- print "regular" + "* " * 30
- #math
- str = "800-820-8800"
- m = re.match(r"(\d{3})-(\d{3})-(\d{4})", str)
- print "result : " ,m.groups()
- #split
- print "split : %s" % re.split('\W', 'Words, words, words.')
- #findall
- text = "He was carefully disguised but captured quickly
by police."- print "findall :%s" % re.findall(r"\w+ly",text)
- #sub
- text = "hello world!"
- print "sub:%s" % re.sub(r"\s+","--",text)
以上就是对Python正则表达式的详细介绍。
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