google-api-python-client HttpRequest execute() exponential backoff
Google API python client already implement automatic retry with exponential backoff ,
if you sometime hit API error because of rate limit or the API server overload because of too many connections.
add num_retries parameter on execute()
num_retries: Integer, number of times to retry 500's with randomized exponential backoff. If all retries fail, the raised HttpError represents the last request. If zero (default), we attempt the request only once.