[Twisted-Python] Have I installed twisted correctly?

[Jean-Paul Calderone]

On Fri, 08 Jun 2007 14:33:57 +0100, Simon Pickles <sipickles at hotmail.com> wrote:
>
>Hi,
>
>I have just been recommended twisted from the python mailing lists. I 
>thought I'd installed it, but I get an error with the first line!
>
>from twisted.internet import reactor
>
>error:
>TypeError: isinstance() arg 2 must be a class, type, or tuple of classes and 
>types
>
>Can an expert help me?
>

Can you provide more context?  The complete traceback would be useful, for
example.

Jean-Paul