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 = 123


f = Foo()
f.value = 999