None Type error for swda datasets
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Thanks for reporting @hannan72 ! I couldn't reproduce the error on my side, can you share the full stack trace please ?
2022-08-29T12:37:21Z
https://github.com/huggingface/datasets/issues/4907#issuecomment-1230229705
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2022-08-29T12:37:21Z
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NONE
Thanks a lot for your response @lhoestq 
The problem is solved accidentally today and I don't know exactly why it was happened yesterday.
The issue can be closed.
2022-08-30T13:59:44Z
https://github.com/huggingface/datasets/issues/4907#issuecomment-1231710487
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MEMBER
Ok, let us know if you encounter the issue again ;)
2022-08-30T14:43:41Z
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## Describe the bug
I got `'NoneType' object is not callable` error while calling the swda datasets.

## Steps to reproduce the bug
```python
from datasets import load_dataset
dataset = load_dataset("swda")
```

## Expected results
Run without error

## Environment info
<!-- You can run the command `datasets-cli env` and copy-and-paste its output below. -->
- `datasets` version: 2.4.0
- Python version: 3.8.10
