Thank you so far, this was the starting point I was look for.
Unfortunatly I’m not familar with python, but if I see correctly, then the problem is the kubernets lib is not really up2date with API support only up to 1.15.
Update: as one can see here support for 1.16 and 1.18 is on the roadmap. I guess the 1.16 support release resolves this Issue.