Py3k support

I'd love to have Python 3.x support, but I need a gentle push in the right direction to get me started. A patch would be best; a link to a package that already uses 2to3 to support both Pythons 2.x and 3.x might do. Especially if that package used doctests, which I've heard can cause problems for 2to3.

I had a quick shot at it. After going down the 2to3 road (and trying to get setup.py test to work sanely) I realised that this module can be made to work in 2.x and 3.x without 2to3.

See my pure3k branch. I dropped support for 2.4 and 2.5, but those can be re-added with a small amount of glue (__func__, __self__, next()).

The test-suite produces different numbers of nodes, but I assume that's expected?

Alternatively, to go the 2to3 route, it may help to have the documentation in a subdirectory.

Since I only recently _added_ Python 2.4 support (after I got a patch from an actual user, debugging a memleak in an old Zope 2 instance), I'm unwilling to drop it.

I was already thinking about moving the docs to a subdirectory, since they're cluttering the root too much.

I'm not married to the 2to3 idea; if it's possible to have a single codebase without too much contortions, that's even better.

I'll take a closer look at your branch a bit later, when I have more time.

Thanks!

I don't know if you got an email notification about the merge proposal I created and commented on. If not, it's here: https://code.launchpad.net/~stefanor/objgraph/pure3k/+merge/43725