[Tutor] setstate trouble when unpickling

[rspil]

I load a "cellule" with 
self.cellule=pickle.load(prjfile)

Within the class "cellule" I use this method  to add an attribute "note"
,with success:
def __setstate__(self, state):
        #20080127 ajoute note
        if 'note' not in state:
            self.note="***"
        self.__dict__.update(state)

self.note="***" is the new attribute in __init__

I checked with a debug: after the pickle.load the class instance is created
without the attribute "note". The method __setstate__ is called and the new
attribute is added.

With python 2.5.1

Robert



Jeff Peery-2 wrote:
> 
> Hello,
>    
>   I've got a fairly simple class instance that I'm pickling. I'm using
> setstate to update the instance when I unpickle. Although the setstate
> doesn't seem to be called upon unpickling... here's an example, if anyone
> see's what I'm doing wrong, please let me know. Thanks!
>    
>   so I say start out with this class:
>    
>   class dog:
>       def __init__(self):
>           self.num_legs = 4
>    
>   then I pickle the instance of:
>   sparky = dog()
>    
>   then I update my dog class to:
>   class dog:
>       def __init__(self):
>           self.hair_color = 'brown'
>           self.num_legs = 4
>    
>       def __setstate__(self, d):
>           if 'hair_color' not in d:
>               d['hair_color'] = 'brown'
>           self.__dict__.update(d)
>           print 'did this work?'
>    
>   Now when I unpickle the original pickled object sparky I would hope to
> see 'did this work' and I would also hope that sparky would have updated
> to have the attribute 'hair_color' but nothing of the sort happens. if
> just unpickles sparky without updating the attributes as I was hoping.
>    
>   Thanks!
>    
>   Jeff
> 
> 
> 
>        
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