Standard class for time *period*?

[Cameron Simpson]

On 28Mar2023 08:05, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
>	So far, you seem to be the only person who has ever asked for a 
>	single
>entity incorporating an EPOCH (datetime.datetime) + a DURATION
>(datetime.timedelta).

But not the only person to want one. I've got a timeseries data format 
where (within a file) time slots are represented as a seconds offset, 
and the file has an associated epoch starting point. Dual to that is 
that a timeslot has an offset from the file start, and that is 
effectively a (file-epoch, duration) notion.

I've got plenty of code using that which passes around UNIX timestamp 
start/stop pairs. Various conversions happen to select the appropriate 
file (this keeps the files of bounded size while supporting an unbounded 
time range).

Even a UNIX timestamp has an implied epoch, and therefore kind of 
represents that epoch plus the timestamp as a duration.

I'm not sure I understand Loris' other requirements though. It might be 
hard to write a general thing which was also still useful.

Cheers,
Cameron Simpson <cs at cskk.id.au>