AttributeError: 'DatasetDict' object has no attribute 'concatenate_datasets'
{'login': 'dorost1234', 'id': 79165106, 'node_id': 'MDQ6VXNlcjc5MTY1MTA2', 'avatar_url': 'https://avatars.githubusercontent.com/u/79165106?v=4', 'gravatar_id': '', 'url': 'https://api.github.com/users/dorost1234', 'html_url': 'https://github.com/dorost1234', 'followers_url': 'https://api.github.com/users/dorost1234/followers', 'following_url': 'https://api.github.com/users/dorost1234/following{/other_user}', 'gists_url': 'https://api.github.com/users/dorost1234/gists{/gist_id}', 'starred_url': 'https://api.github.com/users/dorost1234/starred{/owner}{/repo}', 'subscriptions_url': 'https://api.github.com/users/dorost1234/subscriptions', 'organizations_url': 'https://api.github.com/users/dorost1234/orgs', 'repos_url': 'https://api.github.com/users/dorost1234/repos', 'events_url': 'https://api.github.com/users/dorost1234/events{/privacy}', 'received_events_url': 'https://api.github.com/users/dorost1234/received_events', 'type': 'User', 'site_admin': False}
[]
[]
sorry my mistake, datasets were overwritten closing now, thanks a lot
Hi
I am trying to concatenate a list of huggingface datastes as:

` train_dataset = datasets.concatenate_datasets(train_datasets)
`
Here is the `train_datasets` when I print:

```
[Dataset({
    features: ['attention_mask', 'idx', 'input_ids', 'label', 'question1', 'question2', 'token_type_ids'],
    num_rows: 120361
}), Dataset({
    features: ['attention_mask', 'idx', 'input_ids', 'label', 'question1', 'question2', 'token_type_ids'],
    num_rows: 2670
}), Dataset({
    features: ['attention_mask', 'idx', 'input_ids', 'label', 'question1', 'question2', 'token_type_ids'],
    num_rows: 6944
}), Dataset({
    features: ['attention_mask', 'idx', 'input_ids', 'label', 'question1', 'question2', 'token_type_ids'],
    num_rows: 38140
}), Dataset({
    features: ['attention_mask', 'idx', 'input_ids', 'label', 'question1', 'question2', 'token_type_ids'],
    num_rows: 173711
}), Dataset({
    features: ['attention_mask', 'idx', 'input_ids', 'label', 'question1', 'question2', 'token_type_ids'],
    num_rows: 1655
}), Dataset({
    features: ['attention_mask', 'idx', 'input_ids', 'label', 'question1', 'question2', 'token_type_ids'],
    num_rows: 4274
}), Dataset({
    features: ['attention_mask', 'idx', 'input_ids', 'label', 'question1', 'question2', 'token_type_ids'],
    num_rows: 2019
}), Dataset({
    features: ['attention_mask', 'idx', 'input_ids', 'label', 'question1', 'question2', 'token_type_ids'],
    num_rows: 2109
}), Dataset({
    features: ['attention_mask', 'idx', 'input_ids', 'label', 'question1', 'question2', 'token_type_ids'],
    num_rows: 11963
})]
```

I am getting the following error:

`AttributeError: 'DatasetDict' object has no attribute 'concatenate_datasets'
`

I was wondering if you could help me with this issue, thanks a lot 
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