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Retrying HTTP Requests with Backoff
A technique for retrying failed HTTP requests.
From Google Maps Services Python
""" first_request_time: The time of the first request (None if no retries have occurred). retry_counter: The number of this retry, or zero for first attempt. """ if not first_request_time: first_request_time = datetime.now() elapsed = datetime.now() - first_request_time if elapsed > self.retry_timeout: raise googlemaps.exceptions.Timeout() if retry_counter > 0: # 0.5 * (1.5 ^ i) is an increased sleep time of 1.5x per iteration, # starting at 0.5s when retry_counter=0. The first retry will occur # at 1, so subtract that first. delay_seconds = 0.5 * 1.5 ** (retry_counter - 1) # Jitter this value by 50% and pause. time.sleep(delay_seconds * (random.random() + 0.5)) """ Source: google-maps-services-python https://github.com/googlemaps/google-maps-services-python """
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