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Hugging-Face Transformers：从路径错误加载模型

我对 Hugging-Face 变压器很陌生。当我尝试从给定路径加载xlm-roberta-base模型时，我面临以下问题：

>> tokenizer = AutoTokenizer.from_pretrained(model_path)
>> Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/user/anaconda3/lib/python3.7/site-packages/transformers/tokenization_auto.py", line 182, in from_pretrained
    return tokenizer_class.from_pretrained(pretrained_model_name_or_path, *inputs, **kwargs)
  File "/home/user/anaconda3/lib/python3.7/site-packages/transformers/tokenization_utils.py", line 309, in from_pretrained
    return cls._from_pretrained(*inputs, **kwargs)
  File "/home/user/anaconda3/lib/python3.7/site-packages/transformers/tokenization_utils.py", line 458, in _from_pretrained
    tokenizer = cls(*init_inputs, **init_kwargs)
  File "/home/user/anaconda3/lib/python3.7/site-packages/transformers/tokenization_roberta.py", line 98, in __init__
    **kwargs,
  File "/home/user/anaconda3/lib/python3.7/site-packages/transformers/tokenization_gpt2.py", line 133, in __init__
    with open(vocab_file, encoding="utf-8") as vocab_handle:
TypeError: expected str, bytes or os.PathLike object, not NoneType

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但是，如果我按其名称加载它，则没有问题：