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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 geocode( self, query, exactly_one=True, timeout=DEFAULT_SENTINEL, proximity=None, country=None, bbox=None, ):
 """ Return a location point by address :param str query: The address or query you wish to geocode. :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. :param proximity: A coordinate to bias local results based on a provided location. :type proximity: :class:`geopy.point.Point`, list or tuple of ``(latitude, longitude)``, or string as ``"%(latitude)s, %(longitude)s"``. :param country: Country to filter result in form of ISO 3166-1 alpha-2 country code (e.g. ``FR``). Might be a Python list of strings. .. versionchanged:: 1.19.0 Previously only a single string could be specified. Now a Python list of individual countries is supported. :type country: str or list :param bbox: The bounding box of the viewport within which to bias geocode results more prominently. Example: ``[Point(22, 180), Point(-22, -180)]``. :type bbox: list or tuple of 2 items of :class:`geopy.point.Point` or ``(latitude, longitude)`` or ``"%(latitude)s, %(longitude)s"``. :rtype: ``None``, :class:`geopy.location.Location` or a list of them, if ``exactly_one=False``. """

        params = {}

        params['access_token'] = self.api_key
        query = self.format_string % query
        if bbox:
            params['bbox'] = self._format_bounding_box(
                bbox, "%(lon1)s,%(lat1)s,%(lon2)s,%(lat2)s")

        if not country:
            country = []
        if isinstance(country, string_compare):
            country = [country]
        if country:
            params['country'] = ",".join(country)

        if proximity:
            p = Point(proximity)
            params['proximity'] = "%s,%s" % (p.longitude, p.latitude)

        quoted_query = quote(query.encode('utf-8'))
        url = "?".join((self.api % dict(query=quoted_query),
                        urlencode(params)))
        logger.debug("%s.geocode: %s", self.__class__.__name__, url)

        return self._parse_json(
            self._call_geocoder(url, timeout=timeout)
        )