ompl_app.py run error

After the complete installation of ompl on ubuntu 12.04 when i run ompl_app.py the following error occurs:
Traceback (most recent call last):
File "./ompl_app.py", line 23, in <module>
from PySide import QtCore, QtGui, QtOpenGL
ImportError: No module named PySide

Please help me out how to remove this error.

Also during the installation when I ran this command:
make update_bindings
the following error occured:
make: *** No rule to make target `update_bindings'. Stop.
I skipped this step and moved on.
Please help me solving these issues

Regards,
Fahad