Python clss - based ZClass

I'm trying to make in Zope Python clss - based ZClass. But my pyhon-class has constructor with parametor( def __init__(self,par)).
Okey.
ZClass is ready and i want to create its object
But when i'm trying to create it Zope says that parametor...

How must i give the parametor when i'm trying to create this object

sorry for my english
thanks