I got a list like this

```
numbers = [1 ,4,2,6,7,3]

```

I want to arrange this list in descending order.

```
numbers.sort().reverse()
print(numbers)

```

This is what I tried. But it doesn't work, just showing error message.

```
number.sort()
number.reverse()
print(numbers)

```

This works well, but it seems too long.

What's wrong with the first one? And Why can't I attach two functions in case of `numbers.sort().reverse()`? Why do some codes works well attached together, while some other don't?