Calls a function and retries N times if there is an exception or the returned value by the function is *value_to_retry*

function_tools.py

def retry(callable, callable_args, num_retries=5, sleep_time=0, value_to_retry='f9e40fdf355643dd82cea787ca2e8d3c04966855'):
    """
    Calls a function and retries N times if there is an exception or the returned value by the function is *value_to_retry*

    :param callable: What you want to execute
    :type callable: python callable obj
    :param callable_args: Callable's arguments
    :type callable_args: tuple
    :param num_retries: Numer of retries
    :type num_retries: int
    :param sleep_time: Seconds to sleep between retrials
    :type sleep_time: int
    :param value_to_retry: Checks the return value of the callable and if retry if it's equal
    :type value_to_retry: object

    In use:
        >>> retry(foo, (3, 4), num_retries=10, sleep_time=1)
        >>> retry(foo, (3, 4), num_retries=10, sleep_time=1, value_to_retry=None)
        >>> retry(foo, tuple(), num_retries=3, sleep_time=5, value_to_retry=False)
    """

    for retry in range(num_retries - 1):
        try:
            return_value = callable(*callable_args)
            # Value_to_retry is supposed to be a value that the callable would never return
            if value_to_retry != 'f9e40fdf355643dd82cea787ca2e8d3c04966855' and return_value == value_to_retry:
                if sleep_time:
                    time.sleep(sleep_time)
                continue
            return return_value
        except Exception:
            if sleep_time:
                time.sleep(sleep_time)

    return callable(*callable_args)