code: def use_gpu(initial_override=True):
      global gpus_tested, gpus_found, kernels_found
      if not gpus_tested:
          if not initial_override:
              gpus_tested = True
              return False
  
          try:
              gpus_found = str(
                  subprocess.check_output(["nvidia-smi", "-L"])
              ).count("UUID")
              print(f"Found {gpus_found} gpus")
          except:
              gpus_found = 0
              print(
                  f"Could not find nvidia-smi, please check your cuda installation"
              )
  
          gpus_tested = True
  
      return gpus_found > 0 and kernels_found
  
imports: import numpy
  import time
  import subprocess
  import math
label_desc: Use image node_id 1 for calling a global function with example usage: use_gpu(initial_override) and returns: unknown, False