code: def clear_checkpoints():
      remove_directory(
          "/tmp/tensorflow-checkpoints", ignore_errors=True
      )
  
imports: import nvidia.dali.plugin.tf
  import os
  from nvidia.dali.pipeline import Pipeline
  import nvidia.dali.fn
  import nvidia.dali.types
  from test_utils_tensorflow import num_available_gpus
  from shutil import rmtree
  import tensorflow
  import tensorflow.compat.v1
label_desc: Use image node_id 9 for calling a global function with example usage: clear_checkpoints() without return types