lens.py 文件源码

def mass(self):
        """
        *astropy.Quantity*

        The mass of a point lens --> total mass. An astropy.Quantity
        with mass units. May be set as a float (in which case solMass
        is assumed).
        """
        if self._epsilon.size > 1:
            raise TypeError(
                'mass can only be defined for a point lens. use total_mass' +
                'for multiple bodies')
        else:
            return self.total_mass