NAN
Gordon McMillan
gmcm at hypernet.com
Fri Sep 3 10:19:14 EDT 1999
Ken Koller wrote:
> Is there a constant defined as NAN for floats?
>
> I noticed that 1.0E500 returns the string '1.#INF' and -1.0E500
> returns '-1.#INF' I was just wondering if you could do something
> like:
>
> f = math.NAN
> f = math.INF
> f = -math.INF
>
> etc...
>
> I realize that NAN is implementation dependent and that Python
> shouldn't care about the IEEE type implementations.
>
> Seems like it could be useful to have a constant defined for these.
Some months ago the Timbot (aka Tim Peters) posted some truly
esoteric code that tries to discover what these are for your platform
and C library. Deja news or the search at python.org should find it.
- Gordon
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