How to implement retry mechanism into python requests library?

Question

I would like to add a retry mechanism to python request library, so scripts that are using it will retry for non fatal errors.

At this moment I do consider three kin

Answer 1

from requests.adapters import HTTPAdapter
from urllib3.util.retry import Retry


MAX_RETRY = 2
MAX_RETRY_FOR_SESSION = 2
BACK_OFF_FACTOR = 0.3
TIME_BETWEEN_RETRIES = 1000
ERROR_CODES = (500, 502, 504)


def requests_retry_session(retries=MAX_RETRY_FOR_SESSION,
    back_off_factor=BACK_OFF_FACTOR,
    status_force_list=ERROR_CODES, 
    session=None):
       session = session  
       retry = Retry(total=retries, read=retries, connect=retries,
                     backoff_factor=back_off_factor,
                     status_forcelist=status_force_list,
                     method_whitelist=frozenset(['GET', 'POST']))
       adapter = HTTPAdapter(max_retries=retry)
       session.mount('http://', adapter)
       session.mount('https://', adapter)
       return session



class ConfigService:

   def __init__(self):
      self.session = requests_retry_session(session=requests.Session())

   def call_to_api():
      config_url = 'http://localhost:8080/predict/'
      headers = {
        "Content-Type": "application/json",
        "x-api-key": self.x_api_key
      } 
      response = self.session.get(config_url, headers=headers)
      return response