Author belopolsky
Recipients SilentGhost, acucci, belopolsky, berker.peksag, cvrebert, ezio.melotti, gvanrossum, jerry.elmore, lemburg, martin.panter, matrixise, terry.reedy, tim.peters, vstinner
Date 2016-03-01.21:35:46
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I hope my prediction "I am afraid that the rounding issues may kill this proposal" (see msg202276) will not come true.

I think the correct way to view "timespec" is a way to suppress/enforce printing of trailing digits.

Users that choose printing less than full usec format should make sure that their datetime instances are properly rounded before printing.

Unfortunately, I does not look like the datetime module makes rounding easy.  The best I can think of is something like

def round_datetime(dt, delta):
    dt0 = datetime.combine(, time(0))
    return dt0 + round((dt - dt0) / delta) * delta

Maybe a datetime.round() method along these lines will be a worthwhile addition?
Date User Action Args
2016-03-01 21:35:47belopolskysetrecipients: + belopolsky, lemburg, gvanrossum, tim.peters, terry.reedy, vstinner, ezio.melotti, cvrebert, SilentGhost, berker.peksag, martin.panter, matrixise, jerry.elmore, acucci
2016-03-01 21:35:47belopolskysetmessageid: <>
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2016-03-01 21:35:46belopolskycreate