code: def execute(self):
          
          # Ensure that we have commands registered
          if not self.commands or self._parser is None:
              raise NotImplementedError(
                  "No commands registered with this program!"
              )
  
          # Handle input from the command line
          args = self.parser.parse_args()                # Parse the arguments
  
          try:
  
              handle_default_args(args)                  # Handle the default args
  
              if not hasattr(args, 'func'):              # Handle no subcommands
                  self.parser.print_help()
                  self.exit(0)
  
              msg = args.func(args)                      # Call the default function
              msg = "{}\n".format(msg) if msg else ''    # Format the message
              self.exit(0, msg)                          # Exit cleanly with message
  
          except Exception as e:
              if hasattr(args, 'traceback') and args.traceback:
                  traceback.print_exc()
  
              msg = color.format(str(e), color.RED)
              self.exit(1, msg)
docs: Entry point to the execution of the program.