On Mon, Jul 29, 2013 at 5:09 PM, MRAB <pyt...@mrabarnett.plus.com> wrote: > I'm surprised that Fraction(1/3) != Fraction(1, 3); after all, floats > are approximate anyway, and the float value 1/3 is more likely to be > Fraction(1, 3) than Fraction(6004799503160661, 18014398509481984).
At what point should it become Fraction(1, 3)? >>> Fraction(0.3) Fraction(5404319552844595, 18014398509481984) >>> Fraction(0.33) Fraction(5944751508129055, 18014398509481984) >>> Fraction(0.333) Fraction(5998794703657501, 18014398509481984) >>> Fraction(0.3333333) Fraction(6004798902680711, 18014398509481984) >>> Fraction(0.3333333333) Fraction(6004799502560181, 18014398509481984) >>> Fraction(0.3333333333333) Fraction(6004799503160061, 18014398509481984) >>> Fraction(0.33333333333333333) Fraction(6004799503160661, 18014398509481984) Rounding off like that is a job for a cool library function (one of which was mentioned on this list a little while ago, I believe), but not IMO for the Fraction constructor. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
