Python and Computer Algebra Systems --- is it done?

[David Hoffman]

You said,

> The question is really --- has anyone yet used Python to do any
> symbolic math?

If someone hasn't told you yet, you should definately check out Pythonica,

     http://www.strout.net/info/coding/python/pythonica.html

It is not a full featured CAS, but it does show how to do symbolic math in Python.