We can count backwards to flip a matrix A upside down with

```
sage: A[::-1,:]=A; A
```

Can we do it from left to right; I mean, for the matrix A=

```
[ 3 2 -5 0]
[ 1 -1 1 -4]
[ 1 0 1 -3]
```

Is there an easy way to obtain the following matrix

```
[ 0 -5 2 3]
[-4 1 -1 1]
[ 3 1 0 1]
```