code: def set_cuda_device_index(idx: int) -> None:
      global _cuda_device_index
      _cuda_device_index = idx
      torch.cuda.set_device(_cuda_device_index)
  
imports: import io
  import tempfile
  from typing import Any, Callable, List, Tuple
  import torch
label_desc: Use image node_id 17 for calling a global function with example usage: set_cuda_device_index(idx) without return types