class and private variables

Question

class Test1:
    def __init__( self ):
        self.__test = 1
    def getvalue( self ):
        return self.__test

class Test2( Test1 ):
    def __init__( self ):
        T         


        

Answer 1

This behaviour is due to the name mangling for attribute names starting with __. Basically, __test gets mangled to _Test1__test inside Test1 and to _Test2__test inside Test2, so they are two different attributes.