code: def random_sample():
      shape = np.random.randint(1, 50, [3])
      return np.random.randint(-1000000, 1000000, shape)
  
file_path: DALI/dali/test/python/operator_1/test_batch_permute.py
imports: import nvidia.dali
  import nvidia.dali.fn
  from nvidia.dali.pipeline import Pipeline
  import numpy
  from test_utils import check_batch
  from nose_utils import raises
label_desc: Use image node_id 3 for calling a global function with example usage: random_sample() and returns: np