pycalcal.py 文件源码

def standard_from_sundial(tee, location):
    """Return standard time of temporal moment, tee, at location, location.
    Return BOGUS if temporal hour is undefined that day."""
    date = fixed_from_moment(tee)
    hour = 24 * mod(tee, 1)
    if (6 <= hour <= 18):
        h = daytime_temporal_hour(date, location)
    elif (hour < 6):
        h = nighttime_temporal_hour(date - 1, location)
    else:
        h = nighttime_temporal_hour(date, location)

    # return
    if (h == BOGUS):
        return BOGUS
    elif (6 <= hour <= 18):
        return sunrise(date, location) + ((hour - 6) * h)
    elif (hour < 6):
        return sunset(date - 1, location) + ((hour + 6) * h)
    else:
        return sunset(date, location) + ((hour - 18) * h)


# see lines 3075-3079 in calendrica-3.0.cl