code: def test_qa(self):
      self.assertEqual(
          postprocessors.qa(
              "answer",
              example={"answers": [b"a1", b"a2"]},
              is_target=True,
          ),
          ["a1", "a2"],
      )
      self.assertEqual(
          postprocessors.qa("answer", is_target=False), "answer"
      )
  
file_path: text-to-text-transfer-transformer/t5/data/postprocessors_test.py
imports: from absl.testing import absltest
  import numpy
  from t5.data import postprocessors
label_desc: Use image node_id 6 for calling the PostprocessorsTest obj's underlying member method code with example usage: obj.test_qa() without return types