def get_filter_bbox(self, request):
        tile_string = request.query_params.get(self.tile_param, None)
        if not tile_string:
            return None

        try:
            z, x, y = (int(n) for n in tile_string.split('/'))
        except __HOLE__:
            raise ParseError('Invalid tile string supplied for parameter {0}'.format(self.tile_param))

        bbox = Polygon.from_bbox(tile_edges(x, y, z))
        return bbox
dataset/ETHPy150Open djangonauts/django-rest-framework-gis/rest_framework_gis/filters.py/TMSTileFilter.get_filter_bbox