code: def register(name: str, description: str = "") -> Any:
      """
      Register a subcommand in the command list of PaddleHub
  
      Args:
          name(str) : The name of the command, separated by '.' (e.g, hub.serving)
          description(str) : The description of the specified command showd in the help command, if not description given, this command would not be shown in help command. Default is None.
      """
  
      def _warpper(command):
          items = name.split(".")
  
          com = _commands
          for item in items:
              com = com[item]
          com["_entry"] = command
          if description:
              com["_description"] = description
          return command
  
      return _warpper
  
imports: from collections import defaultdict
  from typing import Any
label_desc: Use image node_id 2 for calling a global function with example usage: register(name, description) and returns: _warpper, command