[Fwd: Comment on PEP-0238]
Guido van Rossum
guido at digicool.com
Sat Jul 7 20:18:02 CEST 2001
> However, I think that some details of the numerics also need to
> be clarified before you boldly go. Specifically,
> - What about long division? A float cannot capture all results.
> Should it raise a Value/Range error?
> Should the programmer be forced to use divmod?
> Should it return a rational?
> I don't really like the last two choices and the first two choices
> obviate much of the usefulness of longs.
We'll introduce a new operator or function (e.g. div(x, y)) for
integer division, which will work for ints and longs. When / is used
and the result can't be expressed as a C double, we can choose between
yielding Infinity or raising OverflowError; I think probably the
latter although with two float arguments this currently returns Inf on
> Perhaps Paul Dubois's kinds mechanism comes to the rescue?
> He does have a trial implementation in numeric (though
> I am not in favor of seeing much of the current numeric
> integrated into the core)
I don't think this will help.
--Guido van Rossum (home page: http://www.python.org/~guido/)
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