def __init__(self, predicates, sampled_records) :
        blocker = blocking.Blocker(predicates)
        blocker.indexAll(sampled_records)

        self.total_cover = self.coveredRecords(blocker, sampled_records)
        self.multiplier = sampled_records.original_length/len(sampled_records)

        self.blocker = blocking.Blocker(predicates)
dataset/ETHPy150Open datamade/dedupe/dedupe/training.py/DedupeBlockLearner.__init__/original