Hi, I want to know how to generate random tensor, excluding some elements.

For example, I am used to using this code to generate random tensor:

```
rand_tensor = torch.zeros(N).random_(0, K)
```

where (0,K) is the range

However, sometimes I want to exclude some probability. For example, I want to generate number in (0,K), but not K/2 and K/3.

What is the most efficient way to do in this situation?