Parse JSON response body.

def _parse_json(self, doc, exactly_one):
        """
        Parse JSON response body.
        """
        places = doc.get('geonames', [])
        self._raise_for_error(doc)
        if not len(places):
            return None

        def parse_code(place):
            """
            Parse each record.
            """
            latitude = place.get('lat', None)
            longitude = place.get('lng', None)
            if latitude and longitude:
                latitude = float(latitude)
                longitude = float(longitude)
            else:
                return None

            placename = place.get('name')
            state = place.get('adminName1', None)
            country = place.get('countryName', None)

            location = ', '.join(
                [x for x in [placename, state, country] if x]
            )

            return Location(location, (latitude, longitude), place)

        if exactly_one:
            return parse_code(places[0])
        else:
            return [parse_code(place) for place in places]