sample retries in python

req_retry.py

def retry(fxn, **kwargs):
    num_retries = 3
    backoff_factor = 0.3
#    status_forcelist = (500, 502, 503, 504)
    for i in range(num_retries):
        try:
            return fxn(kwags)
        except RetryError as err:
            if i >= 1 and i < num_retries - 1: # and err.code in status_forcelist:
                sleep(backoff_factor * 2**(i - 1))


class RetryError(Exception):
    '''Raise when called function fails and should be retried
    
    Attributes:
    code    -- The HTTP status code
    reason  -- The HTTP reason text
    message -- Message to be logged
    '''
    def __init__(self, code, reason, message):
        self.code = code
        self.reason = reason
        self.message = message

sample_request.py

import req_retry
import requests
import json

def call_url(url):
  try:
    response = reqeusts.request('GET', url))
    return json.load(response)
  except Exception as e:
    raise RetryError(response.status_code, response.reason, f"Call to {url} failed")

req_retry.retry(call_url, 
                url='https://tools.learningcontainer.com/sample-json-file.json', 
                headers={'Accept':'application/json'}
               )