Hello Is there a reason the Py_BEGIN_ALLOW_THREADS and Py_END_ALLOW_THREADS don't allow an argument specifying what variable to save the state to? I needed this myself so I wrote the following: #ifdef WITH_THREAD # define MY_BEGIN_ALLOW_THREADS(st) \ { st = PyEval_SaveThread(); } # define MY_END_ALLOW_THREADS(st) \ { PyEval_RestoreThread(st); st = NULL; } #else # define MY_BEGIN_ALLOW_THREADS(st) # define MY_END_ALLOW_THREADS(st) { st = NULL; } #endif It works just fine but has one drawback: Whenever Py_BEGIN_ALLOW_THREADS changes, I have to change my macros too. Wouldn't it be reasonable to supply two sets of macros, one that allows exactly this, and one that does what Py_BEGIN_ALLOW_THREADS currently does. Martin Sjögren -- Martin Sjögren martin@strakt.com ICQ : 41245059 Phone: +46 (0)31 405242 Cell: +46 (0)739 169191 GPG key: http://www.strakt.com/~martin/gpg.html