Unfortunately, the Python 3 version on Raspbian/Stretch is stuck at Python 3.5.3,
which means we can't take advantage of the recent changes
of the awesome asyncio api.
However, we can build and install the latest version from source on the Raspberry Pi as shown below:
It has been a while since I had the time to tinker around and to work on my
pet project. So to get back into hacking mode or tinkering mode, I decided
to proceed with my RPI-based home sensor network project.