Hello,

this might help you a bit.

I use qt designer and then I use pyside's tool to convert the xx.ui to xx.py to include

pyside-uic -d xx.ui -o xx.py

my main body of code (main.py) looks like this:
from PySide import QtCore, QtGui
import sys
import ui


class starter(QtGui.QMainWindow):
def __init__(self, parent=None):
super(starter, self).__init__(parent)
self.ui = ui.Ui_Frame()
self.ui.setupUi(self)

if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
starter = starter()
starter.show()
sys.exit(app.exec_())


Please note that this example, used a frame, so if you start with a widget your line will look something like:
ui.Ui_Widget()

Hope that helps.