__getattr__, __setattr__ and pickle

[mwojc]

Hi!
My class with implemented __getattr__ and __setattr__ methods cannot be
pickled because of the Error:

======================================================================
ERROR: testPickle (__main__.TestDeffnet2WithBiases)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "deffnet.py", line 246, in testPickle
    cPickle.dump(self.denet, file)
TypeError: 'NoneType' object is not callable

----------------------------------------------------------------------

Is there an obvious reason i don't know, which prevents pickling with those
methods (if i comment them out the pickling test passes)?

I'm using Python 2.4.4 on Gentoo Linux. The mentioned methods goes as
follows:

    def __setattr__(self, name, value):
        if name == 'weights':
            j = 0
            for net in self.nets:
                w1 = self.wmarks[j]
                w2 = self.wmarks[j+1]
                net.weights = value[w1:w2]
                j += 1
        else:
            self.__dict__[name] = value
    
    def __getattr__(self, name):
        if name == 'weights':
            j = 0
            for net in self.nets:
                w1 = self.wmarks[j]
                w2 = self.wmarks[j+1]
                self._weights[w1:w2] = net.weights
                j += 1
            return self._weights

Greetings,
-- 
Marek