The easiest way to install PyQt4 4.7 for development is to setup
the sdk repository and the app manager :



Then just as root user launch the following commands :

apt-get update
apt-get install python2.5-qt4

After install completed remove (or inactivate) the sdk repository as it contains packagess
that can blow your n900 system (it ll not brick your device, but it ll require a flash)

Warning : this libs isnt ready yet. It s for development purpose only. But it ll help
developers like to work on PyQt apps on device.

Verify qt version installed by using python :

from PyQt4 import Qt
print Qt.qVersion()