class_docstr: Metaclass that adds the key handlers to the class
docstr: Finds and returns the selected character if it exists in the handler
code: def handle_input(cls):
      "Finds and returns the selected character if it exists in the handler"
      char = get_character()
      if char != KEYMAP["undefined"]:
          char = ord(char)
      handler = cls.key_handler.get(char)
      if handler:
          cls.current_selection = char
          return handler(cls)
      else:
          return None
  
file_path: accelerate/src/accelerate/commands/menu/input.py
imports: from typing import List
  from .keymap import KEYMAP, get_character
label_desc: Use image node_id 2 for calling the KeyHandler obj's underlying member method code with example usage: obj.handle_input(cls) and returns: handler, None