Sunrise Sunset

This class will determine the sunrise and sunset. It can use either official, civil, nautical, amateur, or astronomical zenith.

The constructor takes three positional arguments and one keyword argument. 

ss = SunriseSunset(date, lat, lon, zenith='official')

There are two callable methods after the class is instantiated. 

rise, set = ss.getSunRiseSet()

and 

isNight = ss.isNight()

sunrisesunset.py