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class Protected(type):  def __init__(cls, name, bases, dct):    print 'in metaclass init'    classInit = dct['__init__']    print 'found key init:', classInit    def newInit( self, *args, **kwargs ):       print 'in new init'       classInit( self, *args, **kwargs )    dct['__init__'] = newInit    super(Protected, cls).__init__(name, bases, dct)class Foo:  __metaclass__ = Protected  def __init__(self):    print 'in Foo.init'    self.val = 123f = Foo()f.value = 999