[Python-Dev] Decimal & amp; lt; -& amp; gt; float comparisons in py3k.

Nick Coghlan ncoghlan at gmail.com
Sun Mar 21 02:10:08 CET 2010

Greg Ewing wrote:
> Antoine Pitrou wrote:
>> We forbid comparisons when there is a real danger or ambiguity, such
>> as unicode
>> vs. bytes. There is no such danger or ambiguity when comparing a
>> decimal with a
>> float.
> So do you think that float("0.1") and Decimal("0.1") should be
> equal or not, and why?

Note that Antoine's point was that float("0.1") and
Decimal.from_float(0.1) should compare equal. The latter exactly matches
the underlying binary floating point value:

>>> dec.from_float(0.1)


Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia

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