code: def testPlaceholder(self):
      with self.session():
          # Test using placeholder with a defined shape.
          ph_0 = array_ops.placeholder(dtypes.int32, shape=[])
          result_0 = ops.convert_to_tensor(
              [[0, 0, 0], [0, ph_0, 0], [0, 0, 0]]
          )
          self.assertAllEqual(
              [[0, 0, 0], [0, 1, 0], [0, 0, 0]],
              result_0.eval(feed_dict={ph_0: 1}),
          )
          self.assertAllEqual(
              [[0, 0, 0], [0, 2, 0], [0, 0, 0]],
              result_0.eval(feed_dict={ph_0: 2}),
          )
  
          # Test using placeholder with an undefined shape.
          ph_1 = array_ops.placeholder(dtypes.int32)
          result_1 = ops.convert_to_tensor(
              [[0, 0, 0], [0, ph_1, 0], [0, 0, 0]]
          )
          self.assertAllEqual(
              [[0, 0, 0], [0, 1, 0], [0, 0, 0]],
              result_1.eval(feed_dict={ph_1: 1}),
          )
          self.assertAllEqual(
              [[0, 0, 0], [0, 2, 0], [0, 0, 0]],
              result_1.eval(feed_dict={ph_1: 2}),
          )
  
file_path: tensorflow-upstream/tensorflow/python/kernel_tests/v1_compat_tests/stack_op_test.py
imports: from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
label_desc: Use image node_id 2 for calling the AutomaticStackingTest obj's underlying member method code with example usage: obj.testPlaceholder() without return types