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Add byte token type when tokenizer.model is not exists #4641

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Merged
merged 2 commits into from
Dec 27, 2023
Merged

Add byte token type when tokenizer.model is not exists #4641

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9f297f8
Add byte token type to hf format
strutive07 Dec 26, 2023
ff8b994
remove unused variable
strutive07 Dec 26, 2023
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10 changes: 6 additions & 4 deletions convert.py
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Original file line number Diff line number Diff line change
Expand Up @@ -357,6 +357,7 @@ def __init__(self, params: Params, fname_tokenizer: Path) -> None:
for tok in self.tokenizer.all_special_tokens
}
self.special_ids: set[int] = set(self.tokenizer.all_special_ids)
self.reverse_vocab = {id: encoded_tok for encoded_tok, id in self.tokenizer.get_vocab().items()}
self.vocab_size_base: int = self.tokenizer.vocab_size
self.vocab_size: int = self.vocab_size_base + len(self.added_tokens_dict)
self.fname_tokenizer: Path = fname_tokenizer
Expand All @@ -370,15 +371,13 @@ def __init__(self, params: Params, fname_tokenizer: Path) -> None:
self.spm = None

def hf_tokens(self) -> Iterable[tuple[bytes, float, gguf.TokenType]]:
tokenizer = self.tokenizer
reverse_vocab = {id: encoded_tok for encoded_tok, id in tokenizer.get_vocab().items()}
added_tokens_ids = set(self.added_tokens_dict.values())

for i in range(self.vocab_size_base):
if i in added_tokens_ids:
continue

text = reverse_vocab[i].encode("utf-8")
text = self.reverse_vocab[i].encode("utf-8")
yield text, self.get_token_score(i), self.get_token_type(i)

def get_token_type(self, token_id: int) -> gguf.TokenType:
Expand All @@ -394,10 +393,13 @@ def get_token_type(self, token_id: int) -> gguf.TokenType:
if self.spm.is_byte(token_id):
toktype = gguf.TokenType.BYTE
else:
token = self.reverse_vocab[token_id]
if token_id == self.unk_token_id:
toktype = gguf.TokenType.UNKNOWN
if token_id in self.special_ids:
elif token_id in self.special_ids:
toktype = gguf.TokenType.CONTROL
elif len(token) == 6 and token.startswith("<0x") and token.endswith(">"):
toktype = gguf.TokenType.BYTE

return toktype

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