Try a list comprehension:

```
l = [x * 2 for x in l]
```

This goes through `l`

, multiplying each element by two.

Of course, there’s more than one way to do it. If you’re into lambda functions and `map`

, you can even do

```
l = map(lambda x: x * 2, l)
```

to apply the function `lambda x: x * 2`

to each element in `l`

. This is equivalent to:

```
def timesTwo(x):
return x * 2
l = map(timesTwo, l)
```

Note that `map()`

returns a map object, not a list, so if you really need a list afterwards you can use the `list()`

function afterwards, for instance:

```
l = list(map(timesTwo, l))
```

Thanks to Minyc510 in the comments for this clarification.