evidence_fetcher.TfidfQueryRefiner¶ class evidence_fetcher.TfidfQueryRefiner(*, max_terms: int = 4)[source]¶ Small lexical query refiner based on feedback-marked evidence. __init__(*, max_terms: int = 4) → None[source]¶ Methods __init__(*[, max_terms]) refine(query, evidence, feedback) Append deterministic expansion terms to the original query.