Subtract n months from datetime

[Peter J. Holzer]

On 2022-06-21 05:29:52 +0100, Paulo da Silva wrote:
> I implemented a part of a script to subtract n months from datetime.
> Basically I subtracted n%12 from year and n//12 from the month adding 12
> months when it goes<=0. Then used try when converting to datetime again. So,
> if the day is for example 31 for a 30 days month it raises a ValuError
> exception. Then I subtract 1 to day and repeat.

For a recent longish discussion of that matter see the threads starting
at https://mail.python.org/pipermail/python-list/2022-April/905985.html
and https://mail.python.org/pipermail/python-list/2022-April/906045.html
(the latter also contains some prototype code).

(I apologize for not pursuing that further at the time. I wanted to
bolster that case with some real world applications, but I was a bit
swamped with Real Work™ and didn't find anything suitable.)

        hp

-- 
   _  | Peter J. Holzer    | Story must make more sense than reality.
|_|_) |                    |
| |   | hjp at hjp.at         |    -- Charles Stross, "Creative writing
__/   | http://www.hjp.at/ |       challenge!"
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