Eli Bendersky added the comment:
On Tue, Jan 8, 2013 at 2:51 PM, Daniel Shahaf <rep...@bugs.python.org>wrote:
>
> Daniel Shahaf added the comment:
>
> Eli Bendersky wrote on Tue, Jan 08, 2013 at 15:00:42 +0000:
> >
> > Eli Bendersky added the comment:
> >
> > P = import_fresh_module('xml.etree.ElementTree',
> blocked=['_elementtree'])
> > tb = P.TreeBuilder(element_factory=lambda a, b: [a, b])
> > print(pickle.dumps(tb))
> >
> > Gives: _pickle.PicklingError: Can't pickle <class 'function'>: attribute
> lookup builtins.function failed
>
> Is that with or without the patch?
>
Without. Pickle can't handle functions that are not top-level, so bound
methods, internal functions, lambdas are all out. So pickling probably
wasn't a first priority for the Python version of TreeBuilder as well...
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<http://bugs.python.org/issue16076>
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