Re: Decimal vs Float comparasion

[Wojciech Walczak]

2008/5/6, Yuan HOng <ho**********@gmail.com>:

It seems decimal object will always be larger than float in
comparasion, which goes against common sense:

>>from decimal import Decimal
>>a = Decimal('0.5')
>>a 99999

False

>>a 99999.0

True

It seems to me that rather than allowing this to happen, comparasion
between the two should either be made correct (by convertion decimal
to float e.g.) or forbidden, like arithmatic operations between the
two types.

Looks like a nasty bug.

a 99999.0 returns True because NotImplemented 99999.0 returns True.
a < 99999.0 returns False because NotImplemented < 99999.0 returns False.

As you can see the real comparision has nothing to do with your Decimal number.
I think you can report it at bugs.python.org.

--
Regards,
Wojtek Walczak
http://www.stud.umk.pl/~wojtekwa/