code: def get_data(shapes):
      return [np.empty(shape, dtype=np.uint8) for shape in shapes]
  
file_path: DALI/dali/test/python/operator_1/test_expand_dims.py
imports: from nvidia.dali import pipeline_def
  import nvidia.dali.fn
  import numpy
  from nose_utils import assert_raises
label_desc: Use image node_id 1 for calling a global function with example usage: get_data(shapes) and returns: unknown