code: def _device_type_to_key(device_type: str) -> str:
      if device_type == "default":
          # This is technically not correct, because although all device_type
          # DispatchKeys are included in CompositeExplicitAutograd,
          # not everything in CompositeExplicitAutograd is associated with a
          # device_type. I don't really care that much about the difference.
          return "CompositeExplicitAutograd"
      return torch._C._dispatch_key_for_device(device_type)
  
imports: from ._ops import OpOverload
  from typing import Any, Optional, Set, List
  import traceback
  import torch
  import weakref
  import functools
  import inspect
  import re
  import sys
label_desc: Use image node_id 6 for calling a global function with example usage: _device_type_to_key(device_type) and returns: torch, str