tensorflow/models · error · ValueError

Unknown evidence source: {info.source}.

Error message

Unknown evidence source: {info.source}.

What it means

Error "Unknown evidence source: {info.source}." thrown in tensorflow/models.

Source

Thrown at official/projects/triviaqa/preprocess.py:241

class ReadEvidence(beam.DoFn):
  """Function to read evidence."""

  def __init__(self, wikipedia_dir: Text, web_dir: Text):
    self._wikipedia_dir = wikipedia_dir
    self._web_dir = web_dir

  def process(
      self, question_answer: QuestionAnswer
  ) -> Generator[QuestionAnswerEvidence, None, None]:
    for info in question_answer.evidence_info:
      if info.source == 'EntityPages':
        evidence_path = os.path.join(self._wikipedia_dir, info.id)
      elif info.source == 'SearchResult':
        evidence_path = os.path.join(self._web_dir, info.id)
      else:
        raise ValueError(f'Unknown evidence source: {info.source}.')
      with gfile.GFile(evidence_path, 'rb') as f:
        text = f.read().decode('utf-8')
      metrics.Metrics.counter('_', 'documents').inc()
      yield QuestionAnswerEvidence(
          question=question_answer.question,
          evidence=Evidence(info=info, text=text),
          answer=question_answer.answer)


_CLS_PIECE = '<ans>'
_EOS_PIECE = '</s>'
_SEP_PIECE = '<sep_0>'
# _PARAGRAPH_SEP_PIECE = '<sep_1>'
_NULL_PIECE = '<empty>'
_QUESTION_PIECE = '<unused_34>'


class MakeFeatures(beam.DoFn):

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/projects/triviaqa/preprocess.py:241 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of tensorflow/models@e006f5f0d5 (2026-08-24). Data as JSON: /api/errors/104dacbea1c5efab. Report an issue: GitHub.