[Python-ideas] Date/time literals
tim.peters at gmail.com
Tue Jun 1 20:12:10 CEST 2010
> But I still don't understand why datetime.datetime.toordinal returns
> an int that truncates time information. Is this deliberate?
That it does exactly what it's documented to do is a clue about that ;-)
As the module docs say, the notion of "ordinal" was deliberately
defined in this way:
This matches the definition of the “proleptic Gregorian” calendar in
Dershowitz and Reingold’s book "Calendrical Calculations", where
it’s the base calendar for all computations. See the book for
algorithms for converting between proleptic Gregorian ordinals and
many other calendar systems.
That's the primary use case we had in mind for date & datetime
ordinals. Indeed, the meaning of "ordinal" is "an integer indicating
position in a sequence".
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