ValueError: Please make sure you have `sentencepiece` installed in order to use this tokenizer.
### System Info

- `transformers` version: 4.26.1
- Platform: Linux-5.10.147+-x86_64-with-glibc2.29
- Python version: 3.8.10
- Huggingface_hub version: 0.12.1
- PyTorch version (GPU?): 1.13.1+cu116 (True)
- Tensorflow version (GPU?): 2.11.0 (True)
- Flax version (CPU?/GPU?/TPU?): not installed (NA)
- Jax version: not installed
- JaxLib version: not installed
- Using GPU in script?: <Yes>
- Using distributed or parallel set-up in script?: <No>

### Who can help?

@Narsil @ArthurZucker @younesbelkada 


### Information

- [X] The official example scripts
- [ ] My own modified scripts

### Tasks

- [ ] An officially supported task in the `examples` folder (such as GLUE/SQuAD, ...)
- [ ] My own task or dataset (give details below)

### Reproduction

run in colab the example in this documentation https://huggingface.co/tasks/translation:

```
!pip install transformers transformers[sentencepiece]
```

```
from transformers import pipeline

model_checkpoint = "Helsinki-NLP/opus-mt-en-fr"
translator = pipeline("translation", model=model_checkpoint)
translator("How are you?")
# [{'translation_text': 'Comment allez-vous ?'}]

```

### Expected behavior

output 

```
# [{'translation_text': 'Comment allez-vous ?'}]
```

as signaled in this documentation https://huggingface.co/tasks/translation
Following the steps you indicate to reproduce does not give me any error in Colab. Is it possible you installed sentencepiece after installing transformers and did not restart your environment?<|||||>You are right, thanks @sgugger 
(reloading google colab didn't fix my issue but creating a new colab did the trick)