def periodic(seconds=0, minutes=0, hours=0, days=0, weeks=0, start_date=None,
             end_date=None):
    """
    Periodic task schedule: Use to schedule a task to run periodically,
    starting from start_date (or None to be active immediately) until end_date
    (or None to repeat forever).

    The period starts at the given start_date, or on Jan 1st 2000.

    For more details, see README.
    """
    period = seconds + minutes*60 + hours*3600 + days*86400 + weeks*604800
    assert period > 0, "Must specify a positive period."
    if not start_date:
        # Saturday at midnight
        start_date = datetime.datetime(2000, 1, 1)
    return (_periodic, (period, start_date, end_date))
def periodic ( seconds = 0 , minutes = 0 , hours = 0 , days = 0 , weeks = 0 , start_date = None , end_date = None ) : period = seconds + minutes * 60 + hours * 3600 + days * 86400 + weeks * 604800 assert period > 0 , "Must specify a positive period." if not start_date : start_date = datetime . datetime ( 2000 , 1 , 1 ) return ( _periodic , ( period , start_date , end_date ) )
Periodic task schedule: Use to schedule a task to run periodically,
    starting from start_date (or None to be active immediately) until end_date
    (or None to repeat forever).

    The period starts at the given start_date, or on Jan 1st 2000.

    For more details, see README.