Python tricky name mangling

name_mangling.py

class A:
    def __a(self):
        print("__a")
    def _A__a(self):
        print("_A__a")

    def c(self):
        self.__a()
        self._A__a()

class B:
    def _B__b(self):
        print("_B__b")
    def __b(self):
        print("__b")

    def c(self):
        self.__b()
        self._B__b()


a=A()
a.c()
a._A__a()

b=B()
b.c()
b._B__b()


# Output:
#_A__a
#_A__a
#_A__a
#__b
#__b
#__b