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# 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)
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