Python Retry Request on Error

import logging
import requests

from requests.adapters import HTTPAdapter, Retry

logging.basicConfig(level=logging.DEBUG)

s = requests.Session()
retries = Retry(total=5, backoff_factor=1, status_forcelist=[ 502, 503, 504 ])
s.mount('http://', HTTPAdapter(max_retries=retries))
s.mount('https://', HTTPAdapter(max_retries=retries))
result = s.get("http://httpstat.us/503")
print(result)

you can use urllib3.util.retry module in combination with requests to have something as follow:

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

def retry_session(retries, session=None, backoff_factor=0.3):
    session = session or requests.Session()
    retry = Retry(
        total=retries,
        read=retries,
        connect=retries,
        backoff_factor=backoff_factor,
        method_whitelist=False,
    )
    adapter = HTTPAdapter(max_retries=retry)
    session.mount('http://', adapter)
    session.mount('https://', adapter)
    return session

Usage:

session = retry_session(retries=5)
session.post(url=endpoint, data=json.dumps(x), headers=headers)

NB: You can also inherit from Retry class and customize the retry behavior and retry intervals.

 

I found that the default behaviour of Retries did not apply to POST. To do so required the addition of method_whitelist. You should also be able to do method_whitelist=False to allow retry on POST.

def retry_session(retries=5):
    session = Session()
    retries = Retry(total=retries,
                backoff_factor=0.1,
                status_forcelist=[500, 502, 503, 504],
                method_whitelist=frozenset(['GET', 'POST']))

    session.mount('https://', HTTPAdapter(max_retries=retries))
    session.mount('http://', HTTPAdapter(max_retries=retries))

    return session