runtime error

None of PyTorch, TensorFlow >= 2.0, or Flax have been found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. Traceback (most recent call last): File "/home/user/app/app.py", line 6, in <module> tokenizer = AutoTokenizer.from_pretrained(model_checkpoint) File "/usr/local/lib/python3.10/site-packages/transformers/models/auto/tokenization_auto.py", line 889, in from_pretrained return tokenizer_class.from_pretrained(pretrained_model_name_or_path, *inputs, **kwargs) File "/usr/local/lib/python3.10/site-packages/transformers/tokenization_utils_base.py", line 2163, in from_pretrained return cls._from_pretrained( File "/usr/local/lib/python3.10/site-packages/transformers/tokenization_utils_base.py", line 2397, in _from_pretrained tokenizer = cls(*init_inputs, **init_kwargs) File "/usr/local/lib/python3.10/site-packages/transformers/models/t5/tokenization_t5_fast.py", line 119, in __init__ super().__init__( File "/usr/local/lib/python3.10/site-packages/transformers/tokenization_utils_fast.py", line 134, in __init__ raise ValueError( ValueError: Couldn't instantiate the backend tokenizer from one of: (1) a `tokenizers` library serialization file, (2) a slow tokenizer instance to convert or (3) an equivalent slow tokenizer class to instantiate and convert. You need to have sentencepiece installed to convert a slow tokenizer to a fast one.

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