code: def testFrameSummaryEquality(self):
      frames1 = tf_stack.extract_stack()
      frames2 = tf_stack.extract_stack()
  
      self.assertNotEqual(frames1[0], frames1[1])
      self.assertEqual(frames1[0], frames1[0])
      self.assertEqual(frames1[0], frames2[0])
  
file_path: tensorflow-upstream/tensorflow/python/util/tf_stack_test.py
imports: from tensorflow.python.platform import test
  from tensorflow.python.util import tf_stack
label_desc: Use image node_id 1 for calling the TFStackTest obj's underlying member method code with example usage: obj.testFrameSummaryEquality() without return types