import requests from requests import adapters from urllib3.util import retry  # create a transport adapter with a custom retry strategy. retries = retry(     total=3,     backoff_factor=3,     status_forcelist=[500, 502, 503, 504] ) adapter = adapters.httpadapter(max_retries=retries)  # ensure adapter is used for both http and https requests. session = requests.session() session.mount('https://', adapter) session.mount('http://', adapter)  # testing the retry mechanism response = session.get("http://httpbin.org/status/500") 

RetryError: HTTPConnectionPool(host='httpbin.org', port=80): Max retries exceeded with url: /status/500 (Caused by ResponseError('too many 500 error responses'))