Produits Entr'ouvert » Calebasse

from datetime import timedelta, datetime

__EPOCH = datetime(day=5,month=1,year=1970)

def __date_to_datetime(date):

    return datetime(date.year, date.month, date.day)

def weeks_since_epoch(date):

    days_since_epoch = (__date_to_datetime(date) - __EPOCH).days

    return days_since_epoch // 7

def weekday_ranks(date):

    '''Returns n so that if date occurs on a certain weekday, this is the

    n-th weekday of the month counting from 0. Also return 4 if this the

    last suck weekday of the month. '''

    n = 0

    month = date.month

    i = date - timedelta(days=7)

    while i.month == month:

        n += 1

        i = i - timedelta(days=7)

    if (date+timedelta(days=7)).month != month and n != 4:

        return n, 4

    else:

        return n,