python 重定向获取真实url的方法

http_headers = { 'Accept': '*/*','Connection': 'keep-alive', 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36'}

def get_real_url(url):
 rs = requests.get(url,headers=http_headers,timeout=10)
 rs.url

def get_real_url(url,try_count = 1):
if try_count > 3:
 return url
try:
 rs = requests.get(url,headers=http_headers,timeout=10)
 if rs.status_code > 400:
 return get_real_url(url,try_count+1)
 return rs.url
except:
 return get_real_url(url, try_count + 1)