Qt is very powerful, PySide (Qt for Linux) brings that power to Python. This snap makes it easy for anyone wanting to ship a PySide based app to Linux users by bundling all Qt/PySide dependencies.
With pyside2 snap installed, I was able to create a 'Hello World' pyside based snap with the size of just 8Kb.
The runtime is published to the Snap store: https://snapcraft.io/pyside2
The hello world example that makes use of this snap can be found here: https://github.com/om26er/pyside2-hello-world