You could try following the Installing additional python packages note. However, I believe it is ill advised to use one GUI framework within another. My recommendation would be to use the Qt functionality that is already available for such purposes. For example:
from iolite.QtGui import QFileDialog
name = QFileDialog.getSaveFileName()
You can provide additional parameters to
getSaveFileName for default file names, filters, titles, etc. The original C++ documentation can be found here.
All the best,