Martin v. Löwis <martin@v.loewis.de> added the comment: I fail to see the issue. The documentation clearly says, above the block of all the EX_* constants: Note Some of these may not be available on all Unix platforms, since there is some variation. These constants are defined where they are defined by the underlying platform. That seems to explain the situation well, no? ---------- nosy: +loewis _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue9933> _______________________________________