dizzy@dizzy-pc:~$ sudo add-apt-repository ppa:pyside

You are about to add the following PPA to your system:
 Official Ubuntu packages for PySide Qt Bindings.

dizzy@dizzy-pc:~$ sudo apt-get update

# ... ... 
 
dizzy@dizzy-pc:~$ sudo apt-get install python-pyside
Reading package lists... Done
Building dependency tree    
Reading state information... Done
The following extra packages will be installed:
 libphonon4 libpyside1.1 libqt4-help libqt4-scripttools libqt4-test
 libqtwebkit4 libshiboken1.1 phonon phonon-backend-gstreamer
 python-pyside.phonon python-pyside.qtcore python-pyside.qtdeclarative
 python-pyside.qtgui python-pyside.qthelp python-pyside.qtnetwork
 python-pyside.qtopengl python-pyside.qtscript python-pyside.qtsql
 python-pyside.qtsvg python-pyside.qttest python-pyside.qtuitools
 python-pyside.qtwebkit python-pyside.qtxml

dizzy@dizzy-pc:~$ python

Python 2.7.3 (default, Feb 27 2014, 20:00:17) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.

> import PySide
> dir(PySide)

> PySide.__version__

'1.1.2'

> PySide.QtCore.__version__

'4.8.1'

# -*- coding: utf-8 -*-
 
# Import PySide classes
import sys
from PySide.QtCore import *
from PySide.QtGui import *
 
 
# Create a Qt application 
app = QApplication(sys.argv)
# Create a Label and show it
label = QLabel("Hello World")
label.show()
# Enter Qt application main loop
app.exec_()
sys.exit()

# Import PySide classes 
import sys 
from PySide.QtCore import * 
from PySide.QtGui import * 
 
 
# Create a Qt application 
app = QApplication(sys.argv) 
# Create a Label and show it 
label = QLabel("Hello World") 
label.show() 
# Enter Qt application main loop 
app.exec_() 
sys.exit()