code: def find_dims(layout):
      return layout.find("W"), layout.find("H"), layout.find("D")
  
imports: from nvidia.dali.pipeline import Pipeline
  import nvidia.dali.ops
  import nvidia.dali.types
  import numpy
  import os
  from test_utils import compare_pipelines
  from test_utils import RandomDataIterator
  from test_utils import get_dali_extra_path
label_desc: Use image node_id 2 for calling a global function with example usage: find_dims(layout) and returns: layout,  layout,  layout