You might want to try to port your application to Quickly and use the new Qt application template, which also uses PySide. The quickly package command in the template will package your app for you.
Note that the Quickly Qt template is still work in progress, but if you want to try it, you'll probably need to:
- Install the Quickly Qt app template following the instructions
- Install Quickly

- Create a Quickly project for your app with the
quickly create ubuntu-application-qt myapp (replace myapp with your app's name)
cd myapp and then remove the myapp and myapp_lib folders. Keep the setup.py file, as your app will need it to depend on python-distutils-extra to be packaged
- Put your app's source tree inside the new project, where the
myapp folder used to be
- Tweak as required
- Try to run
quickly package and see if the command packages your app