lens.py 文件源码

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

        Projected separation between the components of the lens in
        AU. An *astropy.Quantity* with distance units. If set as *float*
        (without units), AU is assumed.

        """
        raise NotImplementedError('a_proj is not used, e.g. to set s')
        return self._a_proj