IIR filter conversion routines for Python?

[Aahz]

In article <af91e679-e8cf-4db5-9c88-6436e520ce4e at z7g2000vbh.googlegroups.com>,
wzab  <wzab01 at gmail.com> wrote:
>
>I'm looking for procedures converting the IIR filters into cascade and/
>or parallel forms. Something like dir2cas.m or dir2par.m known in the
>Matlab/Octave world.
>Unfortunately SciPy does not contain such functions.
>If they are not available, I would be grateful for any hints helping
>me to implement them myself.

Even though they're not in SciPy, the mailing lists for NumPy/SciPY are
probably good places to get advice.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"It is easier to optimize correct code than to correct optimized code."
--Bill Harlan