What's Up?

I can't seem to post this in the PyQt section (No post new thread button) Anyway I've started using PyQT to design a UI for my python script, I've googled around for ages and racked by brain, But to no avail, Nothing I've found is specificy tailored to PY-Qt

There's three jobs I need to do between the PyQt User interface and the normal python script. One: Retrieve text from a QLineEdit widget into python variable. Two: Perform python commands when button is clicked and lastly add and remove entry's to Tree widget.

See ya

line_edit = QtGui.QLineEdit()
str(label_edit.displayText())