使用同一个ip频繁爬取一个网站，久了之后会被该网站的服务器屏蔽。所以这个时候需要使用代理服务器。通过ip欺骗的方式去爬取网站

from urllib import request
# 也可以from urllib.request as request
def use_porxy(porxy_addr,url): 
  porxy = request.ProxyHandler({'http':porxy_addr})    
  opener = request.build_opener(porxy, request.ProxyHandler)   request.install_opener(opener)   
  try:
      response = request.urlopen(url, timeout=5)
  except Exception as e:
      print('交接错误，退出程序')
      exit()
  data = response.read().decode('utf-8')    
  return data
  
data = use_porxy("114.115.182.59:128","http://www.baidu.com")
print(len(data)