[MATRIX-SIG] Much ado about nothingness.
Jim Fulton
jim.fulton@digicool.com
Wed, 17 Sep 1997 13:33:22 -0400
Ted Horst wrote:
>
> Has anybody looked at the Missing type from DigiCool ?
(Actually, Digital Creations, aka DC :)
> It has the desired
> behavior for arithmetic operations, but doesn't work correctly for math or
> umath functions. I have no idea how hard this would be to get working,
This would be easy. I'm been meaning too....so little time. :-(
I'd be happy to do this if needed.
> or even
> if this is the proper approach,
Good question. There is the sticky issue that you can't actually
store one of these things in a numeric array. You would have to
pick a "special" numeric value and map to and from it on input and
output. I think this is a good thing to do, but others disagree
with me.
> but somebody else is at least looking at the
> problem. You can get it from http://www.digicool.com/releases/ExtensionClass/.
I also think it would be a good thing for the Numeric types to be
extension classes, so that they could be subclassed in Python.
Jim
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