mirror of
https://github.com/oobabooga/text-generation-webui.git
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34 lines
869 B
Python
34 lines
869 B
Python
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from torch_grammar import GrammarSampler
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from transformers.generation.logits_process import LogitsProcessor
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from modules import shared
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sampler = None
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grammar = None
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grammar_string = ''
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class GrammarLogitsProcessor(LogitsProcessor):
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def __init__(self, string):
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global sampler, grammar, grammar_string
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if string != grammar_string:
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grammar_string = string
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if string.strip() != '':
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string = string.strip() + '\n'
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sampler = GrammarSampler(string, 'root', shared.tokenizer)
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else:
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sampler = None
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if sampler is not None:
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grammar = sampler.logits_processor()
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else:
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grammar = None
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def __call__(self, input_ids, scores):
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if grammar is not None:
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scores = grammar(input_ids, scores)
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return scores
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