code: def test_append_python(self):
      l = []
      self.assertAllEqual(data_structures.list_append(l, 1), [1])
      self.assertAllEqual(data_structures.list_append(l, 2), [1, 2])
  
imports: from tensorflow.python.autograph.operators import data_structures
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import list_ops
  from tensorflow.python.ops import tensor_array_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 11 for calling the ListTest obj's underlying member method code with example usage: obj.test_append_python() without return types