[ python-Bugs-1514428 ] NaN comparison in Decimal broken

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Bugs item #1514428, was opened at 2006-06-29 16:19
Message generated for change (Comment added) made by charlesmerriam
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Category: Python Library
Group: Python 2.5
Status: Open
Resolution: None
Priority: 5
Submitted By: Nick Maclaren (nmm)
Assigned to: Raymond Hettinger (rhettinger)
Summary: NaN comparison in Decimal broken

Initial Comment:
Methinks this is a bit off :-)  True should be False.


Python 2.5b1 (trunk:47059, Jun 29 2006, 14:26:46)
[GCC 4.1.0 (SUSE Linux)] on linux2
>>> import decimal
>>> d = decimal.Decimal
>>> inf = d("inf")
>>> nan = d("nan")
>>> nan > inf
True
>>> nan < inf
False
>>> inf > nan
True
>>> inf < nan
False
b

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Comment By: CharlesMerriam (charlesmerriam)
Date: 2006-08-23 08:43

Message:
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user_id=1581732

More specifically, any comparison with a NaN should equal
False, even inf, per IEEE 754.  A good starting point to
convince oneself of this is http://en.wikipedia.org/wiki/NaN.


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Comment By: Nick Maclaren (nmm)
Date: 2006-07-13 10:35

Message:
Logged In: YES 
user_id=42444

It's still there in Beta 2.


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