I would like to see if there is an elegant solution to this problem.

```
import torch
xb1 = torch.randn(64, 3, 128, 128)
xb2 = torch.randn(64, 3, 128, 128)
x1 = torch.randint(0, 128, (64,))
x2 = torch.randint(0, 128, (64,))
y1 = torch.randint(0, 128, (64,))
y2 = torch.randint(0, 128, (64,))
#this works fine
for i in range(len(x1)):
xb2[i, :, x1[i]:x2[i], y1[i]:y2[i]] = xb1[i, :, x1[i]:x2[i], y1[i]:y2[i]]
#indexing directly thrus error
xb2[:, :, x1:x2, y1:y2] = xb1[:, :, x1:x2, y1:y2]
```

This wil thru error:

```
TypeError Traceback (most recent call last)
<ipython-input-11-88c5a959f6b1> in <module>
13 x1.shape
14
---> 15 xb1[:, :, x1:x2, y1:y2] = xb2[:, :, x1:x2, y1:y2]
TypeError: only integer tensors of a single element can be converted to an index
```

I was able to solve this problem using for loop. Was wondering if torch has better ways to perform this operation