AttributeError: module 'datasets' has no attribute 'load_dataset'
## Describe the bug
I have piped install datasets, but this package doesn't have these attributes: load_dataset, load_metric.

## Environment info
- `datasets` version: 1.9.0
- Platform: Linux-5.13.0-44-generic-x86_64-with-debian-bullseye-sid
- Python version: 3.6.13
- PyArrow version: 6.0.1

