code: def basic_expand_dims(n):
      return n[:, tf.newaxis] - n[tf.newaxis, :]
  
file_path: tensorflow/tensorflow/python/autograph/tests/ext_slice_test.py
imports: import tensorflow
  from tensorflow.python.autograph.tests import reference_test_base
label_desc: Use image node_id 2 for calling a global function with example usage: basic_expand_dims(n) and returns: unknown