"Schmitt Uwe (ID SIS)" <uwe.schmitt@id.ethz.ch> writes:
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) ... Is this a bug or did I miss something ?
The issue is that your __getattr__ raises RuntimeError (due to infinite recursion) for non-existing attributes instead of AttributeError. To fix it, you could use object.__getattribute__: class C: def __init__(self): self.item = [] def __getattr__(self, name): return getattr(object.__getattribute__(self, 'item'), name) There were issues in the past due to {get,has}attr silencing non-AttributeError exceptions; therefore it is good that pickle breaks when it gets RuntimeError instead of AttributeError. -- Akira