class Base1:
    def func1(self):
        print( "this is Base1 class" )


class Base2:
    def func2(self):
        print( "this is Base2 class" )


class Child( Base1, Base2 ):
    def func3(self):
        print( "this is Base3 class" )


obj = Child()
obj.func1()
obj.func2()
obj.func3()