Hi there

I am trying to index a one-dimensional tensor with a two-dimensional index.

In `numpy`

, the following works:

```
a = np.array([5 6 7 8 9])
idx =
[[1 2]
[4 4]
[3 3]
[0 1]
[2 0]]
# such that
a[idx] =
[[6 7]
[9 9]
[8 8]
[5 6]
[7 5]]
```

How do I achieve the same thing in pytorch 1.0?

Doing

```
a = torch.tensor(a)
idx = torch.tensor(idx)
a[idx]
```

yields:

```
IndexError: too many indices for tensor of dimension 1
```