```
What if KeyError? 
```
And what? Will be raised exception, and it should be raised, because each space should contain type, it's our format.

```
Why these methods are not in DisksFormatConvertor?
```
Because it's helper and it's used not only in ```DisksFormatConvertor```

```
And, by the way, why DisksFormatConvertor isn't inherited from object?
```
Ok. I'll fix it.