On 2013.05.05 13:55, Steven D'Aprano wrote: > (you might need to use /S on Windows instead, I'm not sure.) That is only a convention among Microsoft's CLI utilities. Very few others follow it (even for programs written specifically for Windows), and it is certainly not a necessity on Windows. -- CPython 3.3.1 | Windows NT 6.2.9200 / FreeBSD 9.1