[docs] [issue24020] threading.local() must be run at module level (doc improvement)

Ethan Furman added the comment: http://stackoverflow.com/q/1408171/208880 No, it just says (towards the top): ----------------------------------

One important thing that everybody seems to neglect to mention is that writing threadLocal = threading.local() at the global level is required. Calling threading.local() within the worker function will not work.

It is now my experience that "will not work" (reliably) is accurate. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue24020> _______________________________________