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""" |
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Do optional replace of bos/eos/pad/unk. |
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Usage: |
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python3 -m fastchat.data.optional_replace --in input.json --out output.json --model-name-or-path <your_token_path> |
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Requirement: |
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pip3 install transformers tqdm |
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""" |
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import argparse |
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import json |
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import traceback |
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import transformers |
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from tqdm import tqdm |
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def replace_special_tokens( |
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tokenizer: transformers.PreTrainedTokenizer, text: str |
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) -> str: |
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if not text: |
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return text |
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def _insert_vline(token: str) -> str: |
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if len(token) < 2: |
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return " " |
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elif len(token) == 2: |
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return f"{token[0]}|{token[1]}" |
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else: |
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return f"{token[:1]}|{token[1:-1]}|{token[-1:]}" |
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if tokenizer.bos_token: |
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text = text.replace(tokenizer.bos_token, _insert_vline(tokenizer.bos_token)) |
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if tokenizer.eos_token: |
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text = text.replace(tokenizer.eos_token, _insert_vline(tokenizer.eos_token)) |
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if tokenizer.pad_token: |
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text = text.replace(tokenizer.pad_token, _insert_vline(tokenizer.pad_token)) |
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if tokenizer.unk_token: |
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text = text.replace(tokenizer.unk_token, _insert_vline(tokenizer.unk_token)) |
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return text |
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def replace(conv, tokenizer): |
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if tokenizer: |
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try: |
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for sentence in conv["conversations"]: |
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sentence["value"] = replace_special_tokens(tokenizer, sentence["value"]) |
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except Exception as e: |
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traceback.print_exc() |
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if __name__ == "__main__": |
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parser = argparse.ArgumentParser() |
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parser.add_argument("--in-file", type=str, required=True) |
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parser.add_argument("--out-file", type=str) |
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parser.add_argument( |
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"--model-name-or-path", |
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type=str, |
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help="The directory or address where the model token is stored.", |
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) |
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args = parser.parse_args() |
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in_file = args.in_file |
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out_file = args.out_file |
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tokenizer = None |
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if args.model_name_or_path: |
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tokenizer = transformers.AutoTokenizer.from_pretrained( |
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args.model_name_or_path, |
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trust_remote_code=True, |
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use_fast=False, |
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) |
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if out_file is None: |
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out_file = f"{in_file}_replace.json" |
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content = json.load(open(in_file, "r")) |
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for conv in tqdm(content): |
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replace(conv, tokenizer) |
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json.dump(content, open(out_file, "w"), indent=2, ensure_ascii=False) |
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|
