How do I find the previous Monday's date, based off of the current date using Python? I thought maybe I could use:
datetime.weekday() to do it, but I am getting stuck.
I basically want to find today's date and Mondays date to construct a date range query in django using:
>>> import datetime >>> today = datetime.date.today() >>> today + datetime.timedelta(days=-today.weekday(), weeks=1) datetime.date(2009, 10, 26)
Some words of explanation:
Take todays date. Subtract the number of days which already passed this week (this gets you 'last' monday). Add one week.
Edit: The above is for 'next monday', but since you were looking for 'last monday' you could use
today - datetime.timedelta(days=today.weekday())
ChristopheD's post is close to what you want. I don't have enough rep to make a comment :(
Instead of (which actually gives you the next upcoming monday):
>>> today + datetime.timedelta(days=-today.weekday(), weeks=1) datetime.date(2009, 10, 26)
I would say:
>>> last_monday = today - datetime.timedelta(days=today.weekday())
If you want the previous week, add the 'weeks=1' parameter.
This makes the code more readable since you are subtracting a timedelta. This clears up any confusion caused by adding a timedelta that has negative and positive offsets.