Add example files python client

[bossenti]

Purpose

Provide some tutorials for the Python client.

Remarks

PR introduces (a) breaking change(s): no

PR introduces (a) deprecation(s): no

[bossenti]

@dominikriemer @tenthe any idea how to properly put the Apache License header to Jupyter Notebooks?

[tenthe]

I am not sure if this is even possible. It looks like it is json, right?
I saw one solution that suggested to add a dedicated json field for the license information, but I do not think that is a standard way. If it is not possible, we have to exclude it in the apache-rat-plugin configuration in thepom.xml file. There we already exluce .csv & .json files.

[bossenti]

I am not sure if this is even possible. It looks like it is json, right?

@tenthe yes, exactly .ipynb is basically JSON.
I will try to add the license as meta information and exclude jupyter notebooks in the rat-plugin