Update Demo/ and Tools/ directories

["Martin v. Löwis"]

Dennis Benzinger wrote:
> How exactly should the directories be updated? Should it just be made
> sure that the demos and examples are working or should they be updated
> to use the newest applicable Python features (e.g. the new any/all
> functions)?

That's all your choice. The Demo directory should be educational: it
should help to get users started with Python, or a specific library.
If the readability/ease-of-use can be improved, that should be done.
If a new feature might be considered "advanced" (i.e. powerful, but
not easy to explain), it should be avoided.

If you only have the time to make sure the examples work, that would
be fine. If you can spend time redoing them where necessary, that would
be even better.

Regards,
Martin