src/transformers/models/openai/tokenization_openai_fast.py/OpenAIGPTTokenizerFast/__init__
class OpenAIGPTTokenizerFast:    def __init__(self, vocab_file=None, merges_file=None, tokenizer_file=None, unk_token="<unk>", **kwargs):
        super().__init__(vocab_file, merges_file, tokenizer_file=tokenizer_file, unk_token=unk_token, **kwargs)