A real drawn out example (it's bad) to show how private methods in Python work

multiply.py

class Multiply(object):
    def __init__(self, x, y):
        self.x, self.y = x, y

    def value(self):
        return self.__multiply(self.x, self.y)

    def __multiply(self, x, y):
        return x * y

if __name__ == "__main__":
    m = Multiply(2, 4)
    print m.value()
    print m.__multiply(2, 4) # Will raise an exception