code: def basic_ext_slice(n):
      return n[:, :], n[0, :], n[:, 0]
  
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 1 for calling a global function with example usage: basic_ext_slice(n) and returns: n,  n,  n