Comparing float and decimal

Terry Reedy tjreedy at
Fri Sep 26 08:20:08 CEST 2008

Mark Dickinson wrote:
> On Sep 24, 6:18 pm, Terry Reedy <tjre... at> wrote:
>> If there is not now, there could be in the future, and the decimal
>> authors are committed to follow the standard wherever it goes.
>> Therefore, the safe course, to avoid possible future deprecations due to
>> doing too much, is to only do what is mandated.
> Makes sense.  It looks as though the standard's pretty stable now
> though;  I'd be quite surprised to see it evolve to include discussion
> of floats.  But then again, people thought it was stable just before
> all the extra transcendental operations appeared. :-)

What got me were the bizarre new 'logical' operations whose addition 
were rather nonsensical from a Python viewpoint (though probably 
sensible from an IBM profit business viewpoint).  With those added, and 
with this thread, I have decided that Decimals best be thought of as a 
separate universe, not to be mixed with other numbers unless one has 
good reason to and understands the possible anomalies of doing so.  For 
pure finance apps, I would think that there should be little reason to mix.


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