[Mailman-Users] how to make use of Notebook

[ganesh gajre]

Hello ,
Iwant to know that how i can make a notebook of classes from different file.
Like,
I have written two class as python Script Main.py and Start.py. Start is my
first form and Main is second .
How to add both in one class using Notebook widget of PYGTK so whent Next
button is clicked it will open Main form.

Kindly give me reply.