# Subset

Source: https://www.tensorplay.cn/docs/generated/tensorplay.utils.data.Subset.html

```python
class tensorplay.utils.data.Subset(dataset: Dataset[_T_co], indices: Sequence[int])
```

Subset of a dataset at specified indices.

> **Note**
>
> When subclassing Subset and overriding __getitem__, you must also override __getitems__ to ensure DataLoader works correctly with your custom logic. If you override only __getitem__, a NotImplementedError will be raised when using DataLoader.

Parameters:

- dataset ([Dataset](/docs/generated/tensorplay.utils.data.Dataset.html#tensorplay.utils.data.Dataset)) – The whole Dataset

- indices (sequence) – Indices in the whole set selected for subset