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Allow unigram tokenizer to handle NSNumber score values #94

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merged 1 commit into from
Apr 28, 2024
Merged

Allow unigram tokenizer to handle NSNumber score values #94

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17 changes: 15 additions & 2 deletions Sources/Tokenizers/UnigramTokenizer.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
// Copyright © 2024 Hugging Face. All rights reserved.
//

import Foundation
import Hub

class UnigramTokenizer: PreTrainedTokenizerModel {
Expand Down Expand Up @@ -37,8 +38,20 @@ class UnigramTokenizer: PreTrainedTokenizerModel {
}

vocab = try configVocab.map { piece in
guard let token = piece.first as? String else { throw TokenizerError.malformedVocab }
guard let score = piece.last as? Float else { throw TokenizerError.malformedVocab }
guard let token = piece.first as? String,
let scoreValue = piece.last else {
throw TokenizerError.malformedVocab
}

let score: Float
if let floatScore = scoreValue as? Float {
score = floatScore
} else if let numberScore = scoreValue as? NSNumber {
score = numberScore.floatValue
} else {
throw TokenizerError.malformedVocab
}

return SentencePieceToken(token: token, score: score)
}

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