On Thu, Feb 5, 2009 at 6:00 AM, Youri Lammers <youri_lammers...@hotmail.com> wrote: > Ok, > > I want to run a program called 'muscle' with my python script, > muscle uses the following command: > 'muscle.exe -in filename -out filename' > so far I got: > > import os > args = ['-in filename', '-out filename']
As Christian indirectly points out, that's an incorrect tokenization of the arguments. Remember that the shell has no knowledge of what arguments a program takes and so doesn't treat the arguments differently or specially for each program; it instead applies the consistent rule of breaking arguments at spaces (unless you put an argument in quotes). Thus, args should be: args = ['-in', 'filename', '-out', 'filename'] The fact that the program happens to semantically pair those adjacent arguments together is entirely up to and done by the program itself. You can verify this by printing sys.argv from a command-line Python program which you've given arguments to. And of course, you'd only use `args` like this if you were using the `subprocess` module; as others have pointed out, os.system() is more primitive and just takes a single string of the entire command. But `subprocess` is better anyway. Cheers, Chris -- Follow the path of the Iguana... http://rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
