[Datetime-SIG] Clearing up terminology

[Chris Barker]

On Thu, Jul 30, 2015 at 12:51 PM, Tim Peters <tim.peters at gmail.com> wrote:

> I _think_ I've divined the intent now:
>
> - "classic arithmetic":  what Python datetime arithmetic currently does
>
> - "strict arithmetic":  aka timeline arithmetic, what Lennart wants
>

aka "Duration Arithmetic"


> - "human arithmetic"  aka "calendar operations"


aka "Period Arithmetic"


>  For example, there "should be" a way to spell "an
> hour from now" that follows "strict arithmetic" rules when the
> datetime is aware.
>
> Or not ;-)
>

well, "should" is a loaded word, but it would be very, very useful (to some
of us anyway). I deal with scientific datasets, I NEVER want 86400 seconds
later to mean 23 or 25 hours later ;-)

-Chris


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