mirror of
https://github.com/storytold/storyteller-ml.git
synced 2026-10-23 08:26:06 +00:00
Brandon Thomas
71 lines
2.4 KiB
Python
71 lines
2.4 KiB
Python
# Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from pathlib import Path
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import youtokentome as yttm
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from nemo.collections.common.tokenizers import TokenizerSpec
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__all__ = ['YouTokenToMeTokenizer']
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class YouTokenToMeTokenizer(TokenizerSpec):
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def __init__(self, model_path, bpe_dropout=0.0, legacy=False):
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model_path = Path(model_path).expanduser()
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self.tokenizer = yttm.BPE(model=str(model_path))
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self.vocab_size = len(self.tokenizer.vocab())
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self.special_tokens = self.tokens_to_ids(["<PAD>", "<UNK>", "<BOS>", "<EOS>"])
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self.bpe_dropout = bpe_dropout
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self.legacy = legacy
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def text_to_tokens(self, text):
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return self.tokenizer.encode(text, output_type=yttm.OutputType.SUBWORD, dropout_prob=self.bpe_dropout)
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def tokens_to_text(self, tokens):
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return self.ids_to_text(self.tokens_to_ids(tokens))
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def text_to_ids(self, text):
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return self.tokenizer.encode(text, output_type=yttm.OutputType.ID, dropout_prob=self.bpe_dropout)
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def ids_to_text(self, ids):
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ids_ = [id_ for id_ in ids if id_ not in self.special_tokens]
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return self.tokenizer.decode([ids_])[0]
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def tokens_to_ids(self, tokens):
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return [self.tokenizer.subword_to_id(token) for token in tokens]
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def ids_to_tokens(self, ids):
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if self.legacy:
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ids_ = [id_ for id_ in ids if id_ not in self.special_tokens]
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else:
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ids_ = ids
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return [self.tokenizer.id_to_subword(id_) for id_ in ids_]
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@property
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def pad_id(self):
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return self.tokenizer.subword_to_id("<PAD>")
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@property
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def bos_id(self):
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return self.tokenizer.subword_to_id("<BOS>")
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@property
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def eos_id(self):
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return self.tokenizer.subword_to_id("<EOS>")
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@property
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def unk_id(self):
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return self.tokenizer.subword_to_id("<UNK>")
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