personally, I'm going to stick to flask and django.
this is nice and all... but you still have to learn python to get it going. My preference is to learn Python/Flask via books, tutorials, and as part of a big community (websites/forums, IRC, etc).
But... I really don't see the benefit of this, even after watching some videos.
the drag and drop stuff? that's just html and css (child's play)
python? that's still python.
I'd much rather just open a blank Ubuntu 16.04 server on DigitalOcean and pull my repository from github. I.e. work like a real developer :)
I wouldn't mess with Anvil, personally. I'd prefer to do code by hand, with a framework that has been around for a while.