[Python-Dev] Mixing float and Decimal -- thread reboot

[Raymond Hettinger]

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.


Raymond