On Mon, Mar 22, 2010 at 12:45 PM, Mark Dickinson <dicki...@gmail.com> wrote: > On Mon, Mar 22, 2010 at 8:33 PM, Raymond Hettinger > <raymond.hettin...@gmail.com> wrote: >> While we're on the topic, I think you should consider allowing the Fraction() >> constructor to accept a decimal input. >> >> This corresponds to common schoolbook problems and simple client requests: >> "Express 3.5 as a fraction". >> >> >>> Fraction(Decimal('3.5')) >> Fraction(7, 2) >> >> Unlike typical binary floats which use full precision, it is not uncommon >> to have decimal floats with only a few digits of precision where the >> expression as a fraction is both useful and unsurprising. > > Sounds fine to me. Fraction already accepts decimal floating-point > strings, so the implementation of this would be trivial (convert to > string, then call the Fraction constructor).
Better, Fraction.from_decimal() already exists. ;-) -- --Guido van Rossum (python.org/~guido) _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com