2013/11/28 Antoine Pitrou <report@bugs.python.org>:
> Calling it _PyThread_set_key_value is prone to confusion.
> Ideally we would fix PyThread_set_key_value's behaviour. Are there users of the function outside from CPython?

PyThread_set_key_value() is defined and used in CPython, and defined
in the cpyext module of PyPy.

I found two usages of the function:
"pygobject2:/pygobject-2.28.6/glib/pygmainloop.c"
and"pytools:/Servicing/1.1/Release/Product/Python/PyDebugAttach/PyDebugAttach.cpp"
http://searchcode.com/codesearch/view/21308375
http://searchcode.com/codesearch/view/10353970

PyThread_delete_key_value() is always called before
PyThread_set_key_value() (with the same key). So these projects would
not be impacted by the change. I guess that the key is deleted to
workaround the current limitation ("strange behaviour") of
PyThread_set_key_value().

I cannot find pygmainloop.c in the latest development version:
https://git.gnome.org/browse/pygobject/tree/gi/_glib

I searched for usage at:

http://code.ohloh.net/
https://github.com/search/
http://searchcode.com/
http://stackoverflow.com/search

It's hard to find usage of PyThread_set_key_value() before they are a
lot of copies of CPython in the search engines, and I don't know how
to filter.

Victor