Why doesn't pyqt4 work?

Question

Python

PyQt4 does not work after installing PyQt4.
after execution

import sys
from PyQt4 import QtGui
app = QtGui.QApplication(sys.argv)
window = QtGui.QWidget()
window.setGeometry(0, 0, 500, 300)
window.setWindowTitle("PyQT Tuts!")
window.show()
выдает

Got bus address:  "unix:abstract=/tmp/dbus-9GTnpLdtBg,guid=154f6fc3fb26131ee4912b1d57dc0e4e" 
Connected to accessibility bus at:  "unix:abstract=/tmp/dbus-9GTnpLdtBg,guid=154f6fc3fb26131ee4912b1d57dc0e4e" 
Registered DEC:  true

What to do?