[Numpy-discussion] Adding the new polynomial/chebyshev modules.

Anne Archibald peridot.faceted@gmail....
Mon Nov 16 16:06:00 CST 2009


2009/11/16 Christopher Barker <Chris.Barker@noaa.gov>:
> Charles R Harris wrote:
>> I would like some advise on the best way to add the new functions. I've
>> added a new package polynomial, and that package contains four new
>> modules: chebyshev, polynomial, polytemplate, polyutils.
>
> This seems to belong more in scipy than numpy, but I'll leave that to
> others to decide.
>
>> whether or not to include all of the functions in these packages in the
>> __init__.py, or to just import the modules.
>
> Are any of them compiled code? I've been very frustrated when I can't
> use some pure python stuff in scipy because broken compiled fortran
> extensions are getting imported that I don't even need.
>
> If that isn't an issue, and the polynomial package would end up with
> only a handful of names, then I say import them all. Another way to ask
> this: would there by ANY names in the polynomial package if you don't
> import the modules?
>
> If there is compiled code, the import could fail gracefully, and then
> you could still pull it all in.
>
> OTOH, what this does is bring stuff into memory unnecessarily, and also
> brings it into stand-alone bundles (py2exe, py2app, etc). So if these
> modules are not small, then it's probably better to have to import them
> explicitly.
>
> Also -- do you foresee many more polynomial types in the future? I know
> I'd like to see Hermite.

I have kind of gone silent on this issue, in part because I have been
busy with other things. I think that Charles Harris' framework for
working with polynomials is perfectly sufficient for adding Chebyshev
polynomials, and since they're finished and working and fill a
concrete need, they should probably go into numpy or scipy as is. But
if you want to start introducing other types of polynomials - Hermite,
Lagrange interpolation based, Bernstein based, or other - I think we
would need to revive the discussion about how to unify all these
different types.

Anne

> -Chris
>
>
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