# Renaming DatasetDict keys\>

**URL:** <https://discuss.huggingface.co/t/renaming-datasetdict-keys/46897>\
**Category:** Beginners\
**Created:** [July 15, 2023, 7:50am UTC](https://discuss.huggingface.co/t/renaming-datasetdict-keys/46897 "2023-07-15T07:50:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![cryptojointer](https://avatars.discourse-cdn.com/v4/letter/c/b38774/32.png) [@cryptojointer](https://discuss.huggingface.co/u/cryptojointer)\
**Post date:** [July 15, 2023, 7:50am UTC](https://discuss.huggingface.co/t/renaming-datasetdict-keys/46897/1 "2023-07-15T07:50:22Z")

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How do I rename ‘train’ and ‘test’ to ‘test’ and ‘validation’ respectively?

DatasetDict({  
train: Dataset({  
features: [‘prompt’, ‘completion’],  
num\_rows: 894082  
})  
test: Dataset({  
features: [‘prompt’, ‘completion’],  
num\_rows: 383178  
})  
})

Thank you, dictionaries are getting easier, and somehow harder at the same time lol

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<div class="post-metadata">

**Author:** ![mariosasko](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/mariosasko/32/31548_2.png) [@mariosasko](https://discuss.huggingface.co/u/mariosasko)\
**Post date:** [July 17, 2023, 2:46pm UTC](https://discuss.huggingface.co/t/renaming-datasetdict-keys/46897/2 "2023-07-17T14:46:28Z")

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`DatasetDict` is a subclass of `dict`, so you can do this as follows:

```python
train_ds = dataset_dict.pop("train")
test_ds = dataset_dict.pop("test")

dataset_dict["test"] = train_ds
dataset_dict["validation"] = test_ds

```

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<div class="post-metadata">

**Author:** ![cryptojointer](https://avatars.discourse-cdn.com/v4/letter/c/b38774/32.png) [@cryptojointer](https://discuss.huggingface.co/u/cryptojointer)\
**Post date:** [July 18, 2023, 4:17pm UTC](https://discuss.huggingface.co/t/renaming-datasetdict-keys/46897/3 "2023-07-18T16:17:57Z")

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Thank you for this. And thanks for using my examples, helps to understand it better. Much apprciated!