code: def test_while_creates_var_illegal_py(self, target):
      with self.assertRaises(UnboundLocalError):
          tf.function(target)(0)
  
file_path: tensorflow/tensorflow/python/autograph/tests/loop_created_variables_test.py
imports: import itertools
  from absl.testing import parameterized
  import tensorflow
  from tensorflow.python.autograph.tests import reference_test_base
label_desc: Use image node_id 2 for calling the ReferenceTest obj's underlying member method code with example usage: obj.test_while_creates_var_illegal_py(target) without return types