[Zope] Creating a class in a python script

[Ronald L. Chichester]

If I put the code...

class myErrorClass:
  element_number = -1

... and then later...

  an_Error = myErrorClass()
  return an_Error

... I get an error message when the custom class is instantiated and/or
returned.

Can I not create classes within a python script?

Thanks in advance,

Ron