1. 抱抱脸transformers 报错Couldn't instantiate the backend tokenizer

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.

感觉像sentencepiece不匹配transformers.

解决来源

直接在环境里下载干净transformers, 然后pip install transformers sentencepiece，这样会自动匹配合适的sentencepiece。

在colab里也这样安装transformers, 就不会tokenizer时报错