```Python hl_lines="7"
    {!> ../../../docs_src/query_params_str_validations/tutorial006b.py!}
    ```

!!! info
    If you hadn't seen that `...` before: it is a special single value, it is <a href="https://docs.python.org/3/library/constants.html#Ellipsis" class="external-link" target="_blank">part of Python and is called "Ellipsis"</a>.