On Fri, Mar 18, 2022 at 04:26:54PM -0500, Tim Peters wrote: > Another choice is made by math.remainder: > > >>> import math > >>> math.remainder(7, 10) > -3.0
Alas, math.remainder goes through float: >>> math.remainder(3**500, 3) # Should be 0. 1.0 >>> math.remainder(3**500 + 2, 3) # Should be 2. 1.0 It would be nice if remainder() worked properly for exact values, without overflow or rounding errors. > What I'm _guessing_ you mean by "Euclidean division" is that > > 0 <= divmod(a,b) < abs(b) > > That is, the modulus is always non-negative, regardless of the inputs' signs. > > I expect no languages implement that because: (a) there's no > particularly compelling use for it ;-) ; I don't know whether this counts as compelling or not, but I have a divmod variant which returns an always positive modulus for use in base conversion. It is only used in one place in a module I haven't touched in a decade, so it is quite possible that if I were writing that code again today, I wouldn't do it that way. -- Steve _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/PZHZ4WMH6XGMNSNI3ZZD3EY3X37TEHDV/ Code of Conduct: http://python.org/psf/codeofconduct/
