python 爬取ip地址

import urllib.request
import re

def open_url(url):
    req = urllib.request.Request(url)
    req.add_header('User-Agent', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36')
    page = urllib.request.urlopen(req)
    html = page.read().decode('utf-8')

    return html

def get_img(html):
    # 匹配规则 (?: 不匹配(  [0,1]?\d?\d|2[0-4]\d|25[0-5] 匹配如：112，245，1，2
    # \:\d{4}  这个匹配 ：加四个数字也就是端口
    # [0,1]?  ？代表前面那个可有可无
    p = r'(?:(?:[0,1]?\d?\d|2[0-4]\d|25[0-5])\.){3}(?:[0,1]?\d?\d|2[0-4]\d|25[0-5])\:\d{4}'
    iplist = re.findall(p, html)

    for each in iplist:
        print(each)

if __name__ == "__main__":
    url = "http://ip.zdaye.com/dayProxy.html"
    get_img(open_url(url))