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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def directions(self, origin, destination, mode=None, alternatives=None, waypoints=None, optimize_waypoints=False, avoid=None, language=None, units=None, region=None, departure_time=None, arrival_time=None, sensor=None):
 """Get directions between locations :param origin: Origin location - string address; (latitude, longitude) two-tuple, dict with ("lat", "lon") keys or object with (lat, lon) attributes :param destination: Destination location - type same as origin :param mode: Travel mode as string, defaults to "driving". See `google docs details <https://developers.google.com/maps/documentation/directions/#TravelModes>`_ :param alternatives: True if provide it has to return more then one route alternative :param waypoints: Iterable with set of intermediate stops, like ("Munich", "Dallas") See `google docs details <https://developers.google.com/maps/documentation/javascript/reference#DirectionsRequest>`_ :param optimize_waypoints: if true will attempt to re-order supplied waypoints to minimize overall cost of the route. If waypoints are optimized, the route returned will show the optimized order under "waypoint_order". See `google docs details <https://developers.google.com/maps/documentation/javascript/reference#DirectionsRequest>`_ :param avoid: Iterable with set of restrictions, like ("tolls", "highways"). For full list refer to `google docs details <https://developers.google.com/maps/documentation/directions/#Restrictions>`_ :param language: The language in which to return results. See `list of supported languages <https://developers.google.com/maps/faq#languagesupport>`_ :param units: Unit system for result. Defaults to unit system of origin's country. See `google docs details <https://developers.google.com/maps/documentation/directions/#UnitSystems>`_ :param region: The region code. Affects geocoding of origin and destination (see `gmaps.Geocoding.geocode` region parameter) :param departure_time: Desired time of departure as seconds since midnight, January 1, 1970 UTC :param arrival_time: Desired time of arrival for transit directions as seconds since midnight, January 1, 1970 UTC. """
  # noqa
        if optimize_waypoints:
            waypoints.insert(0, "optimize:true")
        parameters = dict(
            origin=self.assume_latlon_or_address(origin),
            destination=self.assume_latlon_or_address(destination),
            mode=mode,
            alternatives=alternatives,
            waypoints=waypoints or [],
            avoid=avoid,
            language=language,
            units=units,
            region=region,
            departure_time=departure_time,
            arrival_time=arrival_time,
            sensor=sensor,
        )
        return self._make_request(self.DIRECTIONS_URL, parameters, "routes")