Exception: cannot import name 'Regex' from 'tokenizers' 
From: site-packages/transformers/convert_slow_tokenizer.py
When first-time call: 
from transformers import XLMRobertaTokenizer
tokenizers-0.10.1 transformers-4.4.2
same problem.

Edit: I updated the package "tokenizers" to the latest version and it works fine.<|||||>Hi! Do you have a colab so we can reproduce the issue? Or some commands we can run to obtain the same environment you have and test it out?<|||||>This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

Please note that issues that do not follow the [contributing guidelines](https://github.com/huggingface/transformers/blob/master/CONTRIBUTING.md) are likely to be ignored.