The method `.reverse()`

reverses the list `L`

on place (it modifies the list `L`

as stated in the tutorial), it does not return a reversed copy of `L`

(it returns nothing, hence your behaviour), but the list `L`

itself is modified as you can check:

```
sage: L = [4,2,5,1,3]
sage: L.reverse()
sage: L
[3, 1, 5, 2, 4]
```

Now if you want to get a reversed copy of `L`

without modifying `L`

, you can use the `reversed()`

function:

```
sage: L = [4,2,5,1,3]
sage: L2 = reversed(L)
sage: L2
<listreverseiterator at 0x65a5d50>
```

As you can see, it returns an iterator, not a list, it means that you can still play with it as if it was a list, but only once (the elements of `L2`

are thrown once used):

```
sage: for i in L2:
....: print i
....:
3
1
5
2
4
sage: for i in L2:
....: print i
....:
<nothing printed>
```

If you want to get a reversed list of `L`

without modifying `L`

you can transform the reversed iterator into a list:

```
sage: L = [4,2,5,1,3]
sage: L2 = list(reversed(L))
sage: L2
[3, 1, 5, 2, 4]
```