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Groups > comp.lang.python > #4558

Re: Pickling extension types

From Robert Kern <robert.kern@gmail.com>
Subject Re: Pickling extension types
Date 2011-05-03 12:10 -0500
Organization The Church of Last Thursday
References <BANLkTi=EQdNdiUWvN-63Vjp2QRBQgVLxvQ@mail.gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.1116.1304442645.9059.python-list@python.org> (permalink)

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On 5/3/11 11:48 AM, Stefan Kuzminski wrote:
> Hi all,
>
> I have an extension type written in C, but I cannot get it to pickle, any
> insights would be greatly appreciated.
>
> I see in the docs that I should define a __reduce__ method and that does get
> called, but I don't know specifically the type of the 'callable object' that
> should be the first thing in the tuple returned by __reduce__.

It should be a callable PyObject* that takes the arguments given in the rest of 
the tuple. Often, this is just the type itself. So probably 
(PyObject*)PyMV_Type, if you give the right arguments in the rest of the tuple.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco

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Re: Pickling extension types Robert Kern <robert.kern@gmail.com> - 2011-05-03 12:10 -0500

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