python requests更换代理适用于IP频率限制的方法

def getProxysFromFile():
 with open("proxy.txt", "r") as f:
  l = f.readlines()
 return l

def run(proxy):
 
 try:
  print("proxy:{}".format(proxy))
  s=requests.Session()
  proxies={
  "http": "http://{}".format(proxy.strip()), "https":"https://{}".format(proxy.strip())
  }
  header={
   "Host":"www.xxx.com",
   "Referer":"http://www.xxx.com/xxx.html",
   "User-Agent":"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36"
 
  }
  ret=s.get(url="http://www.xxx.com/data/dz",headers=header,proxies=proxies,timeout=4)
  rc=ret.content.decode("utf-8")
  print(rc)
  if "成功" in rc:
   global count
   count+=1
   print(count)
 except:
  pass

if __name__ == '__main__':
 count=1
 l=getProxysFromFile()
 while True:
  for i in range(100):
   try:
    t=threading.Thread(target=run,args=(l.pop(),))
    t.start()
   except:
    pass
  time.sleep(5)