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multibyte characters issue #38 #39

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merged 1 commit into from May 3, 2023
Merged

multibyte characters issue #38 #39

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4 changes: 4 additions & 0 deletions src/lmql/runtime/tokenizer.py
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Expand Up @@ -62,6 +62,8 @@ def __call__(self, s: str):
reverse_special_token_mappings = {}

class LMQLTokenizer:
INVALID_CHARACTER = "\uFFFD"

def __init__(self, tokenizer_impl, model_identifier):
self.tokenizer_impl = tokenizer_impl
self.model_identifier = model_identifier
Expand Down Expand Up @@ -111,6 +113,8 @@ def decode(self, input_ids):
extended = self.detokenizer_cache[n-1][key] + "<" + reverse_special_token_mappings[input_ids[-1]] + "/>"
else:
extended = self.detokenizer_cache[n-1][key] + self.tokenizer_impl.decode([input_ids[-1]], clean_up_tokenization_spaces=False)
if self.INVALID_CHARACTER in extended:
return self.detokenizer_cache[n-1][key]
if not n in self.detokenizer_cache.keys():
self.detokenizer_cache[n] = {}
self.detokenizer_cache[n][str(input_ids)] = extended
Expand Down