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from datetime import timedelta, datetime
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__EPOCH = datetime(day=5,month=1,year=1970)
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def __date_to_datetime(date):
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return datetime(date.year, date.month, date.day)
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def weeks_since_epoch(date):
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days_since_epoch = (__date_to_datetime(date) - __EPOCH).days
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return days_since_epoch // 7
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def weekday_ranks(date):
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'''Returns n so that if date occurs on a certain weekday, this is the
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n-th weekday of the month counting from 0. Also return 4 if this the
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last suck weekday of the month. '''
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n = 0
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month = date.month
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i = date - timedelta(days=7)
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while i.month == month:
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n += 1
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i = i - timedelta(days=7)
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if (date+timedelta(days=7)).month != month and n != 4:
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return n, 4
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else:
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return n,
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