In a way that Python is provided by the system out-of-box, you can use regular PyGObject bindings for everything (or Pyside or whatever else you want), use any

In a way that Python is provided by the system out-of-box, you can use regular PyGObject bindings for everything (or Pyside or whatever else you want), use any third party modules from system repos or pip - exactly how you would on a desktop; you can even use it to write system daemons. Neither iOS or Android can compete with that.