sidereal.py: Internal maintenance specification

The main program first processes its command line arguments. Then, if all is well, it converts them to a JulianDate and displays that as a float.

# - - -   m a i n

def main():
    """jd main program.
    """

    #-- 1 --
    # [ if the arguments in sys.argv are valid ->
    #     dt  :=  a datetime.datetime instance representing the
    #             date and time expressed in those arguments ]
    dt  =  argCheck()

    #-- 2 --
    # [ jd  :=  a JulianDate instance representing dt ]
    jd  =  sidereal.JulianDate.fromDatetime ( dt )

    #-- 3 --
    print float(jd)