code: def testPushPeekPopObj(self):
      t_stack = traceable_stack.TraceableStack()
      t_stack.push_obj(42.0)
      t_stack.push_obj("hope")
  
      expected_lifo_peek = ["hope", 42.0]
      self.assertEqual(expected_lifo_peek, list(t_stack.peek_objs()))
  
      self.assertEqual("hope", t_stack.pop_obj())
      self.assertEqual(42.0, t_stack.pop_obj())
  
file_path: tensorflow/tensorflow/python/framework/traceable_stack_test.py
imports: from tensorflow.python.framework import test_util
  from tensorflow.python.framework import traceable_stack
  from tensorflow.python.platform import googletest
  from tensorflow.python.util import tf_inspect
label_desc: Use image node_id 1 for calling the TraceableStackTest obj's underlying member method code with example usage: obj.testPushPeekPopObj() without return types