[issue1158] %f format for datetime objects

Brett Cannon report at bugs.python.org
Thu Sep 13 21:35:31 CEST 2007


Brett Cannon added the comment:

On 9/13/07, Skip Montanaro <report at bugs.python.org> wrote:
>
> Skip Montanaro added the comment:
>
> Brett> Are you going to add support to strptime as well?
>
> I looked at strptime for about two seconds then moved on.  I presume you
> would know how to add it easily though. ;-)
>

Adding support is not issue.  It's exposing the microseconds to
datetime.  It would probably require something along the lines of
returning a tuple with microseconds included and have time use a
function that creates another tuple with that info removed and
datetime using the more informational tuple.

But adding the %f support is very straightforward.

>     Brett> As for the 'time' module, I don't think it would be useful as it serves
>     Brett> no purpose since the time tuple can't resolve to that
>     Brett> resolution.
>
> Resolution isn't the issue.  You just make sure you add enough zeroes to
> make it be microseconds.  The bigger problem is that time.strftime() takes a
> tuple of ints which basically represents a struct tm.  That struct has an
> int seconds field and no sub-second field.  You'd either have to start
> allowing floating point tm_sec fields then either truncating or rounding
> (but which?) to get ints when you need to actually generate an actual struct
> tm.

Right.  I am in favour of this being just a datetime thing as we
should get people moved off of time for stuff like this anyway.

-Brett

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