use

```
a, b, g = self.args
```

Almost every object has what we call arguments that are returned with the method `args`. You can usually find out what the arguments correspond to in the docstring.

It would be safest to use the named properties method of accessing the data, however, as

```
>>> Rotation(0, pi/2, 1).alpha
0
>>> Rotation(0, pi/2, 1).beta
pi/2
>>> Rotation(0, pi/2, 1).gamma
1

so 

a, b, g = self.alpha, self.beta, self.gamma

```