Python - 使用正则表达式查找多个匹配项并将其打印出来 [英] Python - Using regex to find multiple matches and print them out

问题描述

我需要从 HTML 源文件中查找表单的内容，我做了一些搜索并找到了很好的方法来做到这一点，但问题是它只打印出第一个找到的内容，我如何遍历它并输出所有表单内容，而不仅仅是第一个?

I need to find content of forms from HTML source file, I did some searching and found very good method to do that, but the problem is that it prints out only first found, how can I loop through it and output all form contents, not just first one?

line = 'bla bla bla<form>Form 1</form> some text...<form>Form 2</form> more text?'
matchObj = re.search('<form>(.*?)</form>', line, re.S)
print matchObj.group(1)
# Output: Form 1
# I need it to output every form content he found, not just first one...

推荐答案

不要使用正则表达式来解析 HTML.

但如果您需要在字符串中查找所有正则表达式匹配项，请使用 findall 函数.

But if you ever need to find all regexp matches in a string, use the findall function.

import re
line = 'bla bla bla<form>Form 1</form> some text...<form>Form 2</form> more text?'
matches = re.findall('<form>(.*?)</form>', line, re.DOTALL)
print(matches)

# Output: ['Form 1', 'Form 2']

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