Fix evaluator task validation for text2text-generation, summarization, and translation#775
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Summary
Fixes #741.
In recent releases of transformers, the pipeline task registry no longer exposes the text2text-generation, summarization, and translation task names, causing calls to evaluate.evaluator(...) to raise a KeyError even though these are supported evaluator tasks.
This change prioritizes
SUPPORTED_EVALUATOR_TASKSbeforeconsulting the Transformers pipeline task registry, preserving
support for these tasks.
Tests
Added a regression test verifying that:
evaluator("text2text-generation")evaluator("summarization")evaluator("translation")all create the expected evaluator classes.