class too big for one file! How can I split it?

[HHaegele]

Hello,
I have the following structure:

===============
ot_starter.py :
---------------

import OTLib

ot = OTLib.Ot(A, E)

ot.Att()

ot.Btt()

---------------


===============
OTLib.py :
---------------

XX = None

class Ot(a, e):

    def __init__(self, a = None, e = None):
        global XX
        XX = e    
       
    def Att(self):
        global XX
        print XX
        ...
        
---------------

Now, OTLib.py has more then 32000 lines. And that doesn´t work. Python
1.5 can´t execute then. So, how can I add the method Btt()? How can I
make another file, which knows the global XX and who can be handled
from the ot_starter, like it is in one file? Good would also be, if
the Btt() can access XX the same way like Att() can. Is that possible?
Or how must I change the structure?

Thank you 
Heiko