code: def prefer_gpu():
      """Prefer to use GPU(s) if GPU(s) is detected."""
      if torch.cuda.is_available():
          set_gpu_mode(True)
      else:
          set_gpu_mode(False)
  
imports: import copy
  import math
  import warnings
  import torch
  from torch import nn
  import torch.nn.functional
label_desc: Use image node_id 14 for calling a global function with example usage: prefer_gpu() without return types