Python Datetime: All Items From Yesterday

Question

In Python, if I wanted to do a check for all items from yesterday would I do something like:

from datetime import datetime, timedelta

if datetime.datetime.today() - timedelta(days=2) < item_to_check < datetime.datetime.today():

Would this pull all items from yesterday and is this the best way to do it?

score 8 · Accepted Answer · answered Nov 08 '13 at 04:01

8

I'd try something easier ;-)

from datetime import date, timedelta

yesterday = date.today() - timedelta(days=1)
if item_to_check.date() == yesterday:
    # yup!

Note that your:

item_to_check < datetime.datetime.today()

is true for any item that occurred before the second you called datetime.datetime.today(). My date.today() doesn't include hours, minutes or seconds (i.e., it has no "time" component).

answered Nov 08 '13 at 04:01

Tim Peters

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Yup, and if you have lots of items then you can do this in a list using list comprehension. yesterday_items = [item for item in items if item.date() == yesterday] – Owen Nov 08 '13 at 04:02
lol. I think we were typing the same thing. you beat me to it by about 10 seconds. :) – Matt Johnson-Pint Nov 08 '13 at 04:03
@MattJohnson, duplicate answers are common here. Include a lot more explanation than mine, and yours will probably be accepted ;-) – Tim Peters Nov 08 '13 at 04:05
That's ok. You can have this one. I'll get the next. :) – Matt Johnson-Pint Nov 08 '13 at 04:06

Python Datetime: All Items From Yesterday

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