comparing datetime with date

Pierre Fortin pfortin at pfortin.com
Wed Sep 15 02:37:29 CEST 2004


On Wed, 15 Sep 2004 09:24:03 +1000 Graeme wrote:

> This is very interesting because if you continue further and coerce both
> to strings you get:
> 
> >>> print str(y) == str(y) 
of course:      ^         ^   :^)
> True

> Even though there string values are different they still match?

>>> today = datetime.date(2004,9,14)
>>> yesterday = datetime.date(2004,9,13)
>>> now = datetime.datetime(2004,9,14,20,0)
>>> now == today
True
>>> now == yesterday
False
>>>

Looks like date and datetime have 3 arguments and minimum 3 args
respectively, so the comparison appears to simply use the minimum data
available...  when given more data to compare, we get:

>>> minute_ago = datetime.datetime(2004,9,14,19,59)
>>> minute_ago == now
False


> All i can assume is that when a Date / DateTime comparision is made the
> 'lowest denominator' i.e Date is used but I may be very wrong

I agree...

> Will watch this thread closely



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