Maybe include a note in the docstring that this example requires `dogapi`, which is not already installed as a dependency of `grokcli`.

You can also add it to setup.py in the `extras_require` option, for example:

```python
setup(
  ...
  extras_require = {"docs": ["sphinx"], "samples": ["dogapi"]},
  ...
```

Then, it's `pip install grokcli[samples]` or similar.