code: def execute_command(command, args):
      
      if args is None:
          args = sys.argv[1:]
      try:
          command.execute(args)
  
      except IOError as failure:
          if failure.errno == errno.EPIPE:
              # This probably means we were piped into something that terminated
              # (e.g., head).  Might be a better way to handle this, but for now
              # silently swallowing the error isn't terrible.
              pass
  
      except _PartialFailureException as failed:
          for failure, skipped, message in failed.failed:
              print("\nTask {} failed".format(failure), file=sys.stderr)
              print("\tError: {}".format(message), file=sys.stderr)
              print("\tSkipped: {}".format(skipped), file=sys.stderr)
          sys.exit(1)
  
      except Exception as failure:  # pylint: disable=broad-except
          print("Error: {}".format(str(failure)), file=sys.stderr)
          sys.exit(1)
docs: Runs the provided command with the given args.
  
      Exceptions, if any, are propogated to the caller.
  
      Arguments:
      command - something that extends the Command class
      args - A list of command line arguments.  If args is None, sys.argv
             (without the first argument--assumed to be the command name) will
             be used.