On Tue, Jul 13, 2010 at 1:57 PM, Benjamin Peterson <benja...@python.org> wrote:
..
> No! That's not recommended and a complete hack. The "dance" or
> importlib.import_module is preferred.
Nevertheless, "a complete hack" is what PyImport_Import does:
PyObject *
PyImport_Import(PyObject *module_name)
{
static PyObject *silly_list = NULL;
..
/* Call the __import__ function with the proper argument list
* Always use absolute import here. */
r = PyObject_CallFunction(import, "OOOOi", module_name, globals,
globals, silly_list, 0, NULL);
..
}
and _pickle.c uses PyImport_Import() and thus is different form
pickle.py which uses the double-lookup dance. As a result, the two
implementations are subtly different. They cannot be both right. It
should be easy to "fix" _pickle.c to do the sys.modules lookup, but I
am not sure this is right.
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