Concatenate example scripts

[agricolab]

I installed Redis 7.0.4 and used a fresh conda environment to install your package.

Running the writer script alone runs find. Running the reader script afterwards fails as river was not imported there. Reading the documentation in more detail, it seems that both scripts have to be run in one python session, as the latter uses also the w of the earlier. So i tried concatenating them to a large script.

You might want to make this clearer or link to a example.py that already contains a running script.