code: def testPushInEmptyListWithUnknownElementShape(self):
      with self.session(), self.test_scope():
          l = list_ops.empty_tensor_list(
              element_dtype=dtypes.float32,
              element_shape=None,
              max_num_elements=2,
          )
          l = list_ops.tensor_list_push_back(l, [3.0, 4.0])
          # Pushing an element with a different shape should raise an error.
          with self.assertRaisesRegex(errors.InternalError, "shape"):
              l = list_ops.tensor_list_push_back(l, 5.0)
              self.evaluate(
                  list_ops.tensor_list_stack(
                      l, element_dtype=dtypes.float32
                  )
              )
  
imports: import os
  from absl.testing import parameterized
  import numpy
  from tensorflow.compiler.tests import xla_test
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import list_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 12 for calling the ListOpsTest obj's underlying member method code with example usage: obj.testPushInEmptyListWithUnknownElementShape() without return types