code: def disable_gpu():
      """disable gpu for tensorflow."""
      os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
      os.environ["CUDA_VISIBLE_DEVICES"] = str(-1)
  
imports: import os
  import tensorflow
label_desc: Use image node_id 1 for calling a global function with example usage: disable_gpu() without return types