transformers import error
## Environment info
<!-- You can run the command `transformers-cli env` and copy-and-paste its output below.
     Don't forget to fill out the missing fields in that output! -->

- `transformers` version: 4.4.2
- Platform: MACOS
- Python version: Python 3.6.13
- PyTorch version (GPU?): 1.8.0 (cpu)
- Tensorflow version (GPU?): tensorflow-cpu  2.4.1
- Using GPU in script?: no
- Using distributed or parallel set-up in script?:no

### Who can help

@LysandreJik 

I setup my conda envs as below
 
<img width="470" alt="스크린샷 2021-03-23 오후 8 57 52" src="https://user-images.githubusercontent.com/55866896/112142854-70890b80-8c1a-11eb-8752-14857d4529e7.png">

and there are all librarys needed list in !pip3 list 

<img width="310" alt="스크린샷 2021-03-23 오후 9 05 00" src="https://user-images.githubusercontent.com/55866896/112143640-84813d00-8c1b-11eb-8e6c-735d0a57e1c2.png">

but whenever I try to import BertTokenizer(from transformers import BertTokenizer), ImportError occurs.

<img width="662" alt="스크린샷 2021-03-23 오후 8 59 13" src="https://user-images.githubusercontent.com/55866896/112142993-a0381380-8c1a-11eb-8ec1-722d71a947ed.png">

I tried all process in google colab , it works well 
I have no idea why it does not work in my Macbook local environment

please help me
Hello! I would guess something is wrongly setup in your local environment; especially it it works in colab! Are you sure you're using the `python` from the same environment as your `pip3`?<|||||>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.