```Python
{
    "old key": "old value",
    "second old key": "second old value",
    "new key": "new value",
}
```

You can use that technique to re-use some predefined responses in your *path operations* and combine them with additional custom ones.

For example:

```Python hl_lines="13-17  26"
{!../../../docs_src/additional_responses/tutorial004.py!}
```