Hi,

I’m new to Julia and I apologize in advance if there’s a simple answer to my question somewhere but I’ve spent lots of time without any success.

I’m trying to re-write the following Python code in Julia

```
import scipy as sp
psi = sp.ones((1000, 1))
idx_blk = range(15)
x = sp.diag(1.0/psi[idx_blk].T[0])
```

My problem is I don’t know exactly what the `[0]`

in the code above is doing (more of a Python issue but was hoping someone here might have a solution).

Julia

```
using LinearAlgebra
psi = ones(1000, 1)
idx_blk = 1:15
x = Diagonal(1.0 ./ transpose(psi[idx_blk]))
```

Thanks!