Implement loading a dataset builder
COLLABORATOR
#self-assign
2021-06-14T17:25:43Z
https://github.com/huggingface/datasets/issues/2484#issuecomment-860858838
https://api.github.com/repos/huggingface/datasets/issues/2484
MDEyOklzc3VlQ29tbWVudDg2MDg1ODgzOA==
https://api.github.com/repos/huggingface/datasets/issues/comments/860858838/reactions
2021-06-14T17:25:43Z
https://api.github.com/repos/huggingface/datasets/issues/comments/860858838
https://avatars.githubusercontent.com/u/47462742?v=4
https://api.github.com/users/mariosasko/events{/privacy}
https://api.github.com/users/mariosasko/followers
https://api.github.com/users/mariosasko/following{/other_user}
https://api.github.com/users/mariosasko/gists{/gist_id}
https://github.com/mariosasko
mariosasko
MDQ6VXNlcjQ3NDYyNzQy
https://api.github.com/users/mariosasko/orgs
https://api.github.com/users/mariosasko/received_events
https://api.github.com/users/mariosasko/repos
https://api.github.com/users/mariosasko/starred{/owner}{/repo}
https://api.github.com/users/mariosasko/subscriptions
User
https://api.github.com/users/mariosasko
public
As discussed with @stas00 and @lhoestq, this would allow things like:

```python
from datasets import load_dataset_builder
dataset_name = "openwebtext"
builder = load_dataset_builder(dataset_name)
print(builder.cache_dir)
```