On Fri, Sep 4, 2015 at 5:54 PM, Carl Meyer <[email protected]> wrote: > [Tim] > > The term "timeline arithmetic" (aka "strict arithmetic") was also made > > up on this mailing list, but isn't needed to describe anything Python > > does. > > Not even the thing that Python does when you subtract two datetimes > whose tzinfo differs? >
No, because in this case there is no sensible alternative other than what is implemented and making it an error. The only case where two options make sense is the t1 - t2 case where t1.tzinfo is t2.tzinfo. In this case "timeline arithmetic" is not used, so it does not need a name.
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