python week number 와 week number 의 날짜 구하기.

1. week number 구하기.

>>> from datetime import datetime
>>> dt = datetime.now()
>>> dt
datetime.datetime(2013, 2, 25, 14, 49, 53, 870916)
>>> weeknumber = dt.isocalendar()[1]
>>> weeknumber
9
>>>

2. week number 의 포함된 날짜들 구하기.

>>> from datetime import date, timedelta, datetime
>>>
>>> def weekBoundaries(year, week):
...     startOfYear = date(year, 1, 1)
...     now = startOfYear + timedelta(weeks=week-1)
...     sun = now - timedelta(days=now.isoweekday() % 7)
...     weekdays = list()
...     weekdays.append(sun.strftime("%Y%m%d"))
...     weekdays.append((sun + timedelta(days=1)).strftime("%Y%m%d"))
...     weekdays.append((sun + timedelta(days=2)).strftime("%Y%m%d"))
...     weekdays.append((sun + timedelta(days=3)).strftime("%Y%m%d"))
...     weekdays.append((sun + timedelta(days=4)).strftime("%Y%m%d"))
...     weekdays.append((sun + timedelta(days=5)).strftime("%Y%m%d"))
...     weekdays.append((sun + timedelta(days=6)).strftime("%Y%m%d"))
...     return weekdays
...
>>> dt = datetime.now()
>>> year = dt.year
>>> week = dt.isocalendar()[1]
>>> weekdays = weekBoundaries(year, week)
>>> weekdays
['20130224', '20130225', '20130226', '20130227', '20130228', '20130301', '20130302']
>>>

참고 : http://bytes.com/topic/python/answers/499819-getting-start-end-dates-given-week-number