modifying __class__

[Piyush Jain]

Hi,
Itis possible to change the class of an object by assigning new value to
__class__
Is it possible to call my module when it is done.
For example,
object = ClassA()

object.__class__ = classB # I want to call my method when this statement is
executed.

I want to do it in a general way. For ex. , whenever __class__ is changed
for any object instance (of different classes), my own function is called.
How should I do it ?
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