code: def device_get_count():
      init_once()
      if not is_initialized():
          return 0
      else:
          return pynvml.nvmlDeviceGetCount()
  
imports: from __future__ import annotations
  import os
  from enum import IntEnum, auto
  from platform import uname
  from typing import NamedTuple
  from packaging.version import parse
  import dask
label_desc: Use image node_id 4 for calling a global function with example usage: device_get_count() and returns: int, pynvml