def greg_to_jdate(date_or_year, month=None, day=None):
"""
date_or_year can be:
- an instance of the built-in datetime.date/datetime.datetime class
- a utils.GregorianDate namedtuple
- an int representing the Gregorian year
"""
if _is_legal_greg_date(date_or_year, month, day):
if isinstance(date_or_year, datetime.date):
return JDate.fromordinal(date_or_year.toordinal())
if isinstance(date_or_year, int):
y, m, d = date_or_year, month or 1, day or 1
else:
y, m, d = date_or_year # unpack the utils.GregorianDate namedtuple
if y > 0:
return JDate.fromordinal(datetime.date(y, m, d).toordinal())
else:
return julian_to_jdate(greg_to_julian(d, m, y))
def get_molad(month, year):
month_adj = month - 7
if month_adj < 0:
month_adj += JDate.months_in_jyear(year)
total_months = int(month_adj + 235 * int((year - 1) / 19) + 12 *
((year - 1) % 19) +
((((year - 1) % 19) * 7) + 1) / 19)
parts_elapsed = 204 + (793 * (total_months % 1080))
hours_elapsed = 5 + (12 * total_months) + 793 * int(
total_months / 1080) + int(parts_elapsed / 1080) - 6
parts = int((parts_elapsed % 1080) + 1080 * (hours_elapsed % 24))
return dict(JDate=JDate.fromordinal((1 + (29 * int(total_months))) +
int((hours_elapsed / 24))),
time=HourMinute(
int(hours_elapsed) % 24, int((parts % 1080) / 18)),
chalakim=parts % 18)
