Yes one will have to chose a more standard format to sent over the TCP networking interface. It kind of works now, if you plot the readable values from the python console the data matches. But there will still be some try and error to find the best data format or the thing 'by adding size headers to everything' (self-made protocol, might just do the trick) - it will eventually work.
A 'sort-of-solution' in the files. Thx for the github link!
python_client2.txt
Sine.vi
Simple TCP - ServerSINE.vi