Error message is bad when you forget to include the command name

[alex]

$ twine cffi-0.8.3-cp*
Traceback (most recent call last):
  File "app_main.py", line 75, in run_toplevel
  File "/Users/alex_gaynor/.virtualenvs/tempenv-3aed5394482d/bin/twine", line 11, in <module>
    sys.exit(main())
  File "/Users/alex_gaynor/.virtualenvs/tempenv-3aed5394482d/site-packages/twine/__main__.py", line 24, in main
    return dispatch(sys.argv[1:])
  File "/Users/alex_gaynor/.virtualenvs/tempenv-3aed5394482d/site-packages/twine/cli.py", line 41, in dispatch
    p = subprocess.Popen(["twine-{0}".format(args.command)] + args.args)
  File "/Users/alex_gaynor/.pyenv/versions/pypy-2.3.1/lib-python/2.7/subprocess.py", line 709, in __init__
    errread, errwrite)
  File "/Users/alex_gaynor/.pyenv/versions/pypy-2.3.1/lib-python/2.7/subprocess.py", line 1330, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

Would be nice if it said something like "cffi not a command name" or similar.