And I was thinking it would complicate/impossible to create an application for Ubuntu Phone using Python, but not, it's easy :)
Dan Chapman helped me adapting Python for uNav (Thanks mate!).
A so basic example is here.
Download it and from the shell (maybe you'll need system depedences as pyotherside package) in Ubuntu 16.04+ run these commands:
$ git clone https://github.com/costales/tutorial_apps_UT.git
$ cd tutorial_apps_UT/python/
$ qmlscene qml/Main.qml
I think the example in the directory qml/Main.qml is so simple for understanding the concept, but if you have any doubt, please, leave a comment :)