# tensorplay.autograd.forward_ad.unpack_dual

Source: https://www.tensorplay.cn/docs/generated/tensorplay.autograd.forward_ad.unpack_dual.html

```python
tensorplay.autograd.forward_ad.unpack_dual(tensor: Tensor, *, level: int | None = None) → UnpackedDualTensor
```

Unpacks a dual tensor into its primal value and forward gradient.

Returns (primal, tangent) where primal is a view of tensor’s
primal and tangent is tensor’s tangent (None when tensor
carries no tangent at level).