code: def register_input(name: str, input_creator: Callable):
      """Register a custom input api for RLlib.
  
      Args:
          name: Name to register.
          input_creator: Callable that creates an
              input reader.
      """
      if not callable(input_creator):
          raise TypeError(
              "Second argument must be callable.", input_creator
          )
      _global_registry.register(RLLIB_INPUT, name, input_creator)
  
imports: import atexit
  import logging
  from functools import partial
  from types import FunctionType
  from typing import Callable, Optional, Type, Union
  import ray
  import ray.cloudpickle
  from ray.experimental.internal_kv import _internal_kv_get, _internal_kv_initialized, _internal_kv_put, _internal_kv_del
  from ray.tune.error import TuneError
  from ray.util.annotations import DeveloperAPI
label_desc: Use image node_id 9 for calling a global function with example usage: register_input(name, input_creator) without return types