Numeric comparison anomaly

[Gary Herron]

On Thursday 20 February 2003 01:13 pm, Piet van Oostrum wrote:
> >>>>> sismex01 at hebmex.com (S) wrote:
> >>
> >> From: Piet van Oostrum [mailto:piet at cs.uu.nl]
> >> Sent: Thursday, February 20, 2003 4:56 AM
> >>
> >> >>>>> Gerrit Holl <gerrit at nl.linux.org> (GH) schreef:
>
> GH> You can use the __cmp__ overloader:
>
> GH> 21 >>> class A:
> GH> 21 ...  def __cmp__(self, other):
> GH> 21 ...   return 1
> GH> 21 ...
> GH> 22 >>> A() > 5
> GH> True
> GH> 23 >>> A() < 9
> GH> False
> GH> 24 >>> A() >= 3
> GH> True
>
> >> >>> inf = A()
> >> >>> inf > inf
> >>
> >> True
> >>
> >> >>> inf == inf
> >>
> >> False
>
> S> This is correct, or wrong?
>
> I would consider that incorrect. But others may differ. But if it is
> considered correct, then > is not an ordering for sets that include inf.
> On the other hand, in Python > isn't an ordering in general.


Actually, Python's > *is* an ordering, but he is *not* using 
python's > operator.  He has redefined it (in a silly fashion)
with the __cmp__ method.

Gary Herron