[docs] [issue13574] refresh example in doc for Extending and Embedding

New submission from Florent Xicluna <florent.xicluna@gmail.com>: The example uses PyInstanceObject which is Python 2 only (old-style classes). http://docs.python.org/dev/extending/newtypes.html#weak-reference-support ---------- assignee: docs@python components: Documentation, Extension Modules messages: 149183 nosy: docs@python, flox priority: normal severity: normal stage: needs patch status: open title: refresh example in doc for Extending and Embedding type: behavior versions: Python 3.2, Python 3.3 _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue13574> _______________________________________