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Feature to use the PreTrainedTokenizerFast class as a stand-alone tokenizer (#11810)

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* feature for tokenizer without slow/legacy version

* format

* modify common test

* add tests

* add PreTrainedTokenizerFast to AutoTokenizer

* format

* change tokenizer common test in order to be able to run test without a slow version

* update tokenizer fast test in order to use `rust_tokenizer_class` attribute instead of `tokenizer_class`

* add autokenizer test

* replace  `if self.tokenizer_class is not None` with ` if self.tokenizer_class is None`

* remove obsolete change in comment

* Update src/transformers/tokenization_utils_base.py

Co-authored-by: Lysandre Debut <lysandre@huggingface.co>

* Update src/transformers/tokenization_utils_fast.py

Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

* change `get_main_tokenizer` into `get_tokenizers`

* clarify `get_tokenizers` method

* homogenize with `test_slow_tokenizer` and `test_rust_tokenizer`

* add `test_rust_tokenizer = False` to tokenizer which don't define a fast version

* `test_rust_tokenizer = False` for BertJapaneseTokenizer

* `test_rust_tokenizer = False` for BertJapaneseCharacterTokenizationTest

Co-authored-by: Lysandre Debut <lysandre@huggingface.co>
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
This commit is contained in:
SaulLu
2021-06-14 11:58:44 +02:00
committed by GitHub
parent 4a51b1dd9b
commit 476ba679dd
14 changed files with 254 additions and 96 deletions
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7
src/transformers/tokenization_utils_base.py
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@@ -1872,14 +1872,15 @@ class PreTrainedTokenizerBase(SpecialTokensMixin, PushToHubMixin):
save_directory (:obj:`str` or :obj:`os.PathLike`): The path to a directory where the tokenizer will be saved.
legacy_format (:obj:`bool`, `optional`):
Only applicable for a fast tokenizer. If unset (default), will save the tokenizer in the unified JSON
format as well as in legacy format, i.e. with tokenizer specific vocabulary and a separate added_tokens
files.
format as well as in legacy format if it exists, i.e. with tokenizer specific vocabulary and a separate
added_tokens files.
If :obj:`False`, will only save the tokenizer in the unified JSON format. This format is incompatible
with "slow" tokenizers (not powered by the `tokenizers` library), so the tokenizer will not be able to
be loaded in the corresponding "slow" tokenizer.
If :obj:`True`, will save the tokenizer in legacy format.
If :obj:`True`, will save the tokenizer in legacy format. If the "slow" tokenizer doesn't exits, a
value error is raised.
filename_prefix: (:obj:`str`, `optional`):
A prefix to add to the names of the files saved by the tokenizer.