Author tim.peters
Recipients aconrad, belopolsky, larry, mark.dickinson, r.david.murray, tbarbugli, tim.peters, trcarden, vivanov, vstinner
Date 2015-08-28.22:31:58
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Message-id <1440801119.01.0.529032315902.issue23517@psf.upfronthosting.co.za>
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> Does your algorithm guarantee that any float that
> is displayed with 6 decimal places or less will
> convert to a datetime or timedelta with microseconds
> matching the fractional part?

No algorithm can, for datetimes far enough in the future (C doubles just plain run out of enough bits).

Apart from negative timestamps (which I didn't consider - they just blow up on my platform :-) ), the intent is to do the best that _can_ be done.

But _proving_ things in this area isn't simple, and there's no need for it:  check in a change to round the thing, and be done with it.  If Victor wants to rework rounding again, that's fine, but only under a _requirement_ that this particular bug remain fixed.  His change created the problem, and it's still languishing half a year after being reported - there's little sense in continuing to wait for him to do something about it.
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Date User Action Args
2015-08-28 22:31:59tim.peterssetrecipients: + tim.peters, mark.dickinson, belopolsky, vstinner, larry, r.david.murray, aconrad, vivanov, tbarbugli, trcarden
2015-08-28 22:31:59tim.peterssetmessageid: <1440801119.01.0.529032315902.issue23517@psf.upfronthosting.co.za>
2015-08-28 22:31:58tim.peterslinkissue23517 messages
2015-08-28 22:31:58tim.peterscreate