Python爬虫设置代理IP的方法(爬虫技巧)

# IP地址取自国内髙匿代理IP网站：http://www.xicidaili.com/nn/# 仅仅爬取首页IP地址就足够一般使用from bs4 import BeautifulSoupimport requestsimport randomdef get_ip_list(url, headers):  web_data = requests.get(url, headers=headers)  soup = BeautifulSoup(web_data.text, 'lxml')  ips = soup.find_all('tr')  ip_list = []  for i in range(1, len(ips)):    ip_info = ips[i]    tds = ip_info.find_all('td')    ip_list.append(tds[1].text + ':' + tds[2].text)  return ip_listdef get_random_ip(ip_list):  proxy_list = []  for ip in ip_list:    proxy_list.append('http://' + ip)  proxy_ip = random.choice(proxy_list)  proxies = {'http': proxy_ip}  return proxiesif __name__ == '__main__':  url = 'http://www.xicidaili.com/nn/'  headers = {    'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36'  }  ip_list = get_ip_list(url, headers=headers)  proxies = get_random_ip(ip_list)  print(proxies)函数get_ip_list(url, headers)传入url和headers，最后返回一个IP列表，列表的元素类似42.84.226.65:8888格式，这个列表包括国内髙匿代理IP网站首页所有IP地址和端口。 

web_data = requests.get(url, headers=headers, proxies=proxies)