See Is it possible to use Python with the Ubuntu SDK? I don't think that the current status is different:

pyqt might not be the best choice in terms of licensing commercial applications

And taken from the ubuntu-phone mailing list archive:

While PyOtherSide may work, it's not a supported language or platform for the Ubuntu SDK, so we can't guarantee that it will always work or work properly. I would encourage you to use Javascript instead of at all possible.