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| """ Implementation of OKapi BM25 with sklearn's TfidfVectorizer | |
| Distributed as CC-0 (https://creativecommons.org/publicdomain/zero/1.0/) | |
| """ | |
| import numpy as np | |
| from sklearn.feature_extraction.text import TfidfVectorizer | |
| from scipy import sparse | |
| class BM25(object): |