在python中使用正则表达式从锚标记中提取数据

问题描述

我正在尝试使用 regex 从网页中提取超链接. Python.

I'm trying to extract the hyperlinks from a webpage using regex in Python.

假设我的文本字符串是:

suppose my text string is:

text = '<a href="/status/ALL">ALL</a></td>/n<a href="/status/ASSIGN">ASSIGN</a></td>'

，我想提取ALL和ASSIGN，我正在使用以下正则表达式:

and I want to extract ALL and ASSIGN,I'm using this regular expression:

re.findall(r'<a href=.*>(\w+)</a>', text, re.DOTALL)

这仅返回ASSIGN.

this just returns ASSIGN.

有人可以帮助我指出正则表达式中的错误吗?我真的是这个话题的新手.

Can someone please help me in pointing out the mistake in the regular expression? I'm really new to this topic.

推荐答案

您正在使用正则表达式，并且将具有此类表达式的XML匹配为.

You are using a regular expression, and matching XML with such expressions get too complicated, too fast.

请不要让自己烦恼，而要使用HTML解析器，Python有多种选择:

Please don't make it hard on yourself and use a HTML parser instead, Python has several to choose from:

• ElementTree 是标准库的一部分
• BeautifulSoup 是一个受欢迎的第三方图书馆
• lxml 是一个快速且功能丰富的基于C的库.

• ElementTree is part of the standard library
• BeautifulSoup is a popular 3rd party library
• lxml is a fast and feature-rich C-based library.

ElementTree示例:

ElementTree example:

from xml.etree import ElementTree

tree = ElementTree.parse('filename.html')
for elem in tree.findall('a'):
    print ElementTree.tostring(elem)

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