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Construct a BPE tokenizer for HerBERT (backed by HuggingFace's tokenizers library).
Peculiarities:
- uses BERT's pre-tokenizer: BertPreTokenizer splits tokens on spaces, and also on punctuation. Each occurrence of
a punctuation character will be treated separately.
This tokenizer inherits from [`TokenizersBackend`] which contains most of the methods. Users should refer to the
superclass for more information regarding methods.
Args:
vocab_file (`str`):
Path to the vocabulary file.
merges_file (`str`):
Path to the merges file.
cls_token (`str`, *optional*, defaults to `""`):
The classifier token.
unk_token (`str`, *optional*, defaults to `""`):
The unknown token.
pad_token (`str`, *optional*, defaults to `""`):
The padding token.
mask_token (`str`, *optional*, defaults to `""`):
The mask token.
sep_token (`str`, *optional*, defaults to `""`):
The separator token.
vocab (`str`, `dict` or `list`, *optional*):
Custom vocabulary dictionary.
merges (`str` or `list[str]`, *optional*):
Custom merges list.
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