STINNER Victor added the comment: Ah, I wrote "def create_subprocess_exec(program, *args," to implicitly check that args is non empty. We can either change the function prototype to check that args is non-empty in the body, or just update the documentation. The documentation is not exactly wrong :-) ---------- nosy: +haypo _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue29893> _______________________________________