python 用正则表达式提取

Question

请问怎么用正则表达式提取
“< a h r e f = “ # ” >”中#所代表的内容呢？

谢谢！

Answer 1

单个匹配可以用下列代码

import re

html = '<a href="#">'
pattern = r'href="(.*?)"'
match = re.search(pattern, html)

if match:
    value = match.group(1)
    print(value)  # Output: #

全部匹配出来可以用下列代码

import re

html = '<a href="#">'
pattern = r'href="(.*?)"'
matches = re.findall(pattern, html)

for match in matches:
    print(match)