calc_isoradials
===============

.. py:method:: luminet.black_hole.BlackHole.calc_isoradials(direct_r: List[int | float], ghost_r: List[int | float]) -> List[luminet.isoradial.Isoradial]

   Calculate isoradials for a list of radii for the direct image and/or ghost image.

   These calculations are parallellized using the :py:class:`multiprocessing.Pool` class.

   :Parameters: * **direct_r** (*List[int | float]*) -- list of radii for the direct image
                * **ghost_r** (*List[int | float]*) -- list of radii for the ghost image

   :returns: List[:class:`~luminet.isoradial.Isoradial`] -- list of calculated isoradials