Name twilight given solar altitude
====================================

.. p23ready

.. currentmodule:: PyAstronomy.pyasl
.. autofunction:: twilightName

Example
--------

::

    from __future__ import print_function, division
    from PyAstronomy import pyasl
    import numpy as np
    
    for alt in np.linspace(-20., 5., 15):
      print("Altitude = {0:6.2f}, Twilight is called: ".format(alt), \
            pyasl.twilightName(alt))