code: def test_docs(self):
      for doc in self.dataset["test"]:
          yield doc["text"]
  
imports: import inspect
  import lm_eval.datasets.pile.pile
  from lm_eval.base import PerplexityTask
label_desc: Use image node_id 4 for calling the PilePerplexityTask obj's underlying member method code with example usage: obj.test_docs() without return types