| # Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved. | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| from typing import List | |
| from sacremoses import MosesDetokenizer, MosesPunctNormalizer, MosesTokenizer | |
| class MosesProcessor: | |
| """ | |
| Tokenizer, Detokenizer and Normalizer utilities in Moses | |
| """ | |
| def __init__(self, lang_id: str): | |
| self.moses_tokenizer = MosesTokenizer(lang=lang_id) | |
| self.moses_detokenizer = MosesDetokenizer(lang=lang_id) | |
| self.normalizer = MosesPunctNormalizer(lang=lang_id) | |
| def detokenize(self, tokens: List[str]) -> str: | |
| """ | |
| Detokenizes a list of tokens | |
| Args: | |
| tokens: list of strings as tokens | |
| Returns: | |
| detokenized string | |
| """ | |
| return self.moses_detokenizer.detokenize(tokens) | |
| def tokenize(self, text: str): | |
| """ | |
| Tokenizes text using Moses -> Sentencepiece. | |
| """ | |
| return self.moses_tokenizer.tokenize(text, escape=False, return_str=True) | |
| def normalize(self, text: str): | |
| return self.normalizer.normalize(text) | |