This patch presents my first try to apply the proposed Refactoring of PEP3121 to the csv module. I have identified three mutable global variables inside the module, two of which are references to PyObjects. I have wrapped all of them inside a dedicated struct, which is traversed by the gc after "freeing" the module. I also defined some macros, to hide functions calls that are now needed because of the newly introduced indirections.

The following script should fail before you have applied the bespoken patch: It basically checks wether one of the global PyObjects inside the csv module is being deleted after freeing the csv module.

> Changes by Éric Araujo <merwok@netwok.org>:
>
>
> ----------
> nosy: +skip.montanaro

Thanks, but I'm out of the Python development business, except as it
pertains to my day job...

Skip

PyModule_AddObject steals the value's reference, so you need to INCREF it before. Besides that, I don't see any obvious bug, but perhaps Martin wants to take a look.

Skip: I used the nosy field autocomplete which is based on the experts file in the devguide; I can mark you "retired" in that file so that your name does not show up in autocomplete (but humans will still know that you might be contacted when all else fails, unless you prefer your name to be fully removed).

> Skip: I used the nosy field autocomplete which is based on the experts file in the devguide; I can mark you "retired" in that file so that your name does not show up in autocomplete (but humans will still know that you might be contacted when all else fails, unless you prefer your name to be fully removed).

Thanks.  That would be great.  I don't mind the occasional question,
but don't want people thinking I am going to jump in feet first any
time I'm made nosy on a ticket.

S

New changeset 90cf321615e5 by Antoine Pitrou in branch 'default':
Remove Skip from the csv experts (see issue #14732).
http://hg.python.org/devguide/rev/90cf321615e5

New changeset 2496602a56e5 by Antoine Pitrou in branch 'default':
Issue #14732: The _csv module now uses PEP 3121 module initialization.
http://hg.python.org/cpython/rev/2496602a56e5

Thanks for the updated patch, Robin. I have now committed it to the default branch.

Robin, I forgot: could you please sign and send the contrib form at http://www.python.org/psf/contrib/ ?
It is not a copyright assignment, just a piece of paper that formally allows us to license your contribution for distribution with Python.