How To Get Week Start Dates And Week Number Of Each Week In A Year Considering Start Day Of The Week Is Monday In Python?

How can I get week start dates of each week in a year, considering start day of the week is Monday in python? This assumes start day is Sunday: >>>import datetime as datet

Solution 1:

I don't think behaviour of isocalendar can be changed.

From : http://docs.python.org/2/library/datetime.html#datetime.date.isocalendar

The first week of an ISO year is the first (Gregorian) calendar week of a year containing a Thursday.

But strftime can display week number :

%U "All days in a new year preceding the first Sunday are considered to be in week 0." %W "All days in a new year preceding the first Monday are considered to be in week 0."

>>>import datetime>>>dt = datetime.date(2013,12,30)>>>dt.isocalendar()
(2014, 1, 1)
>>>dt.strftime("%U")
'52'

But to respond to your first question, why don't you just use datetime.timedelta ?

>>>import datetime>>>dt = datetime.date(2013,12,30)>>>w = datetime.timedelta(weeks=1)>>>dt - w
datetime.date(2013, 12, 23)
>>>dt + w
datetime.date(2014, 1, 6)
>>>dt + 10 * w
datetime.date(2014, 3, 10)