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[Python-Dev] Change the repr for datetime.timedelta (was Re: Asynchronous context manager in a typical network server)

Alexander Belopolsky alexander.belopolsky at gmail.com
Sun Dec 20 20:00:53 EST 2015 
On Sun, Dec 20, 2015 at 5:28 PM, Chris Angelico <rosuav at gmail.com> wrote:

> > A helpful trivia: a year is approximately π times 10 million seconds.
>
> Sadly doesn't help here, as the timedelta for a number of years looks like
> this:
>
> >>> datetime.timedelta(days=365*11)
> datetime.timedelta(4015)
>
>
The original issue was how long is a million seconds.  The bit of trivia
that I suggested helps to establish that it cannot be a multiple of years.


> Would there be value in changing the repr to use keyword arguments?
>

I don't think translating from seconds to years will be any simpler with
any alternative  repr, but I would really like to see a change in the repr
of negative timedeltas:

>>> timedelta(minutes=-1)
datetime.timedelta(-1, 86340)

And str() is not much better:

>>> print(timedelta(minutes=-1))
-1 day, 23:59:00

The above does not qualify as a human readable representation IMO.
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