Dear all, I discovered a problem using cPickle.loads from CPython 2.7.6. The last line in the following code raises an infinite recursion class T(object): def __init__(self): self.item = list() def __getattr__(self, name): return getattr(self.item, name) import cPickle t = T() l = cPickle.dumps(t) cPickle.loads(l) loads triggers T.__getattr__ using "getattr(inst, "__setstate__", None)" for looking up a "__setstate__" method, which is not implemented for T. As the item attribute is missing at this time, the ininfite recursion starts. The infinite recursion disappears if I attach a default implementation for __setstate__ to T: def __setstate__(self, dd): self.__dict__ = dd This could be fixed by using „hasattr“ in pickle before trying to call „getattr“. Is this a bug or did I miss something ? Kind Regards, Uwe