[Python-Dev] python2.7 infinite recursion when loading pickled object (original) (raw)

R. David Murray rdmurray at bitdance.com
Mon Aug 11 14:10:30 CEST 2014

On Mon, 11 Aug 2014 21:43:00 +1000, Chris Angelico <rosuav at gmail.com> wrote:

On Mon, Aug 11, 2014 at 9:40 PM, Peter Otten <peter at web.de> wrote: > Read again. The OP tries to delegate attribute lookup to an (existing) > attribute. > > IMO the root cause of the problem is that pickle looks up dunder methods > in the instance rather than the class.

The recursion comes from the attempted lookup of self.item, when init hasn't been called.

Indeed, and this is what the OP missed. With a class like this, it is necessary to make it pickleable, since the pickle protocol doesn't call init.

--David

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