Help replacing os.system call with subprocess call

[David Pratt]

Hi. I am trying to replace a system call with a subprocess call. I have
tried subprocess.Pope n and subprocess.call with but have not been
successful. The command line would be:

svnadmin dump /my/repository svndump.db

This is what I am using currently:

os.system('svna dmin dump %s %s' % (svn_dir,
os.path.join(ba ckup_dir, 'svndump.db')))

Many thanks.