Return a location point by address.

        :param str query: The address or query you wish to geocode.

        :param int max_results: The maximum number of resutls to request.

        :param float set_back: The distance to move the accessPoint away
            from the curb (in meters) and towards the interior of the parcel.
            location_descriptor must be set to accessPoint for set_back to
            take effect.

        :param str location_descriptor: The type of point requested. It
            can be any, accessPoint, frontDoorPoint, parcelPoint,
            rooftopPoint and routingPoint.

        :param bool exactly_one: Return one result or a list of results, if
            available.

        :param int timeout: Time, in seconds, to wait for the geocoding service
            to respond before raising a :class:`geopy.exc.GeocoderTimedOut`
            exception. Set this only if you wish to override, on this call
            only, the value set during the geocoder's initialization.

        :rtype: ``None``, :class:`geopy.location.Location` or a list of them, if
            ``exactly_one=False``.

def geocode(
            self,
            query,
            max_results=25,
            set_back=0,
            location_descriptor='any',
            exactly_one=True,
            timeout=DEFAULT_SENTINEL,
    ):
        """
        Return a location point by address.

        :param str query: The address or query you wish to geocode.

        :param int max_results: The maximum number of resutls to request.

        :param float set_back: The distance to move the accessPoint away
            from the curb (in meters) and towards the interior of the parcel.
            location_descriptor must be set to accessPoint for set_back to
            take effect.

        :param str location_descriptor: The type of point requested. It
            can be any, accessPoint, frontDoorPoint, parcelPoint,
            rooftopPoint and routingPoint.

        :param bool exactly_one: Return one result or a list of results, if
            available.

        :param int timeout: Time, in seconds, to wait for the geocoding service
            to respond before raising a :class:`geopy.exc.GeocoderTimedOut`
            exception. Set this only if you wish to override, on this call
            only, the value set during the geocoder's initialization.

        :rtype: ``None``, :class:`geopy.location.Location` or a list of them, if
            ``exactly_one=False``.
        """
        params = {'addressString': self.format_string % query}
        if set_back != 0:
            params['setBack'] = set_back
        if location_descriptor not in ['any',
                                       'accessPoint',
                                       'frontDoorPoint',
                                       'parcelPoint',
                                       'rooftopPoint',
                                       'routingPoint']:
            raise GeocoderQueryError(
                "You did not provided a location_descriptor "
                "the webservice can consume. It should be any, accessPoint, "
                "frontDoorPoint, parcelPoint, rooftopPoint or routingPoint."
            )
        params['locationDescriptor'] = location_descriptor
        if exactly_one:
            max_results = 1
        params['maxResults'] = max_results

        url = "?".join((self.api, urlencode(params)))
        logger.debug("%s.geocode: %s", self.__class__.__name__, url)
        response = self._call_geocoder(url, timeout=timeout)

        # Success; convert from GeoJSON
        if not len(response['features']):
            return None
        geocoded = []
        for feature in response['features']:
            geocoded.append(self._parse_feature(feature))
        if exactly_one:
            return geocoded[0]
        return geocoded