Пример обработки исключений в запросах requests

request_retry.py

def read_timeout_handler(func, url, timeout, retries=None, params={}, **kw):
    "Retries on read timeout"
    if not hasattr(timeout, '__iter__'):
        timeout = [timeout] * (retries or 1)
    elif retries is not None:
        raise ValueError("retries specified along with list of timeouts")
    for retry, tm in enumerate(timeout):
        try:
            r = None  # init
            r = func(url, params=params, timeout=tm, **kw)
            if retry > 0:
                logging.warning("#Success (%s), %d retry(s)", params, retry)
            break  # exit for..in
        except requests.exceptions.ReadTimeout as e:  # FIXME: TEST
            logging.warning('READ TIMEOUT %s', e.args)  # args -> urllib3.exceptions.ReadTimeoutError
            logging.warning(
                "#Request (%s) failed (timeout %ds, code %d), retry",
                params, tm, getattr(r, 'status_code', 0)
            )
        except requests.exceptions.ConnectionError as e:
            # https://github.com/requests/requests/issues/2392
            # ProtocolError=Удаленный хост принудительно разорвал существующее подключение
            if not isinstance(e.args[0], (#urllib3.exceptions.ReadTimeoutError, #<-TimeoutError
                                          urllib3.exceptions.ProtocolError,
                                          urllib3.exceptions.TimeoutError,
                                          urllib3.exceptions.MaxRetryError,
                                          )):
                logging.warning("DEBUG: %s %s", type(e.args[0]), e.args[0])
                raise  # it's not a timeout error, re-raise
            logging.warning(
                "#Request (%s) failed (timeout %ds, code %d), retry",
                params, tm, getattr(r, 'status_code', 0)
            )
    return r