code: def pop_if_set():
      if "CUDA_VISIBLE_DEVICES" in os.environ.keys():
          os.environ.pop("CUDA_VISIBLE_DEVICES")
  
file_path: py3nvml/tests/test_py3nvml.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  from time import sleep
  from py3nvml.py3nvml import *
  import pytest
  from py3nvml.utils import grab_gpus, get_free_gpus
  import os
label_desc: Use image node_id 1 for calling a global function with example usage: pop_if_set() without return types