How to use the pytileproj.geometry.bbox2polygon function in pytileproj

def __init__(self, core, continent):

        _core = copy.copy(core)
        _core.tag = continent
        _core.projection = TPSProjection(epsg=4326)

        self.core = _core
        self.polygon_geog = bbox2polygon([(-179.9999999, -90.0), (179.9999999, 90.0)],
                                         self.core.projection.osr_spref)
        self.tilesys = CopernicusTilingSystem(self.core, self.polygon_geog)

        super(CopernicusSubgrid, self).__init__(self.core, self.polygon_geog, self.tilesys)