在Python中调用基类方法[bis]

Question

与this question一样，我试图从派生类中调用基类的方法：

class Base(object):
    def __get(self):
        print "Base::get"

class Derived(Base):
    def __init__(self):
        super(Derived,self).__get()

d=Derived()

为什么此代码会返回AttributeError: 'super' object has no attribute '_Derived__get'？