9 def run_demo(demo, quiet=False):  argument
12     if quiet:
18 def run_demos(demos, quiet=False):  argument
25         if not quiet:
27         success = run_demo(demo, quiet=quiet)
30             if not quiet:
32         if quiet:
38     if failures and not quiet:
42 def run_all_demos(quiet=False):  argument
51     return run_demos(all_demos, quiet=quiet)
59     success = run_all_demos(quiet=options.quiet)