def retry(func, *args, **kwargs):
    global url, token, parsed, conn
    retries = kwargs.get('retries', 5)
    use_account = 1
    if 'use_account' in kwargs:
        use_account = kwargs['use_account']
        del kwargs['use_account']
    use_account -= 1
    attempts = 0
    backoff = 1
    while attempts <= retries:
        attempts += 1
        try:
            if not url[use_account] or not token[use_account]:
                url[use_account], token[use_account] = \
                    get_auth(swift_test_auth, swift_test_user[use_account],
                             swift_test_key[use_account])
                parsed[use_account] = conn[use_account] = None
            if not parsed[use_account] or not conn[use_account]:
                parsed[use_account], conn[use_account] = \
                    http_connection(url[use_account])
            return func(url[use_account], token[use_account],
                       parsed[use_account], conn[use_account], *args, **kwargs)
        except (socket.error, HTTPException):
            if attempts > retries:
                raise
            parsed[use_account] = conn[use_account] = None
        except AuthError, err:
            url[use_account] = token[use_account] = None
            continue
        except InternalServerError, err:
            pass
        if attempts <= retries:
            sleep(backoff)
            backoff *= 2
    raise Exception('No result after %s retries.' % retries)
A genetic algorithm is a stochastic search method  based on natural selection.
dataset/ETHPy150Open dpgoetz/sos/test_sos/functional/sos_testing.py/retry--crossover with--dataset/ETHPy150Open clips/pattern/pattern/vector/__init__.py/GeneticAlgorithm.__init__