Thanks for the clues, I made a modification so that reduce returns this..
return Py_BuildValue("O(OOOOO)", Py_TYPE(self), PyTuple_New(0), Py_None,
Py_None, Py_None );
and now I get this different error when trying to pickle the type..
----------------------------------------------------------------------
Traceback (most recent call last):
File "test_missing.py", line 16, in test
print cPickle.dumps( mv )
PicklingError: Can't pickle <type 'MV'>: attribute lookup __builtin__.MV
failed
thx,
S
One grep through the source later:
>
> >>> slice(1,2,3).__reduce__()
> (<type 'slice'>, (1, 2, 3))
>
> And the implementation seems straightforward:
>
> static PyObject *
> slice_reduce(PySliceObject* self)
> {
> return Py_BuildValue("O(OOO)", Py_TYPE(self), self->start, self->stop,
> self->step);
> }
>
>
>
> (*) it uses __getnewargs__
>
>
>
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> http://mail.python.org/mailman/listinfo/python-list
>
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