gas.py 文件源码

def total_number(self, aper, eph=None):
        """Total number of molecules in aperture.

        Parameters
        ----------
        aper : `~astropy.units.Quantity` or `~sbpy.activity.Aperture`
          Observation aperture as a radius for a circular aperture
          (projected length, or angle) or an `Aperture` instance.

        eph : dictionary-like or `~sbpy.data.Ephem`, optional
          Ephemerides at epoch; requires geocentric distance as
          `delta` keyword if aperture has angular units.


        Returns
        -------
        N : int

        """
        pass