import sys
from PySide import QtGui, QtCore

app = QtGui.QApplication(sys.argv)
mw = QtGui.QMainWindow()
tw = QtGui.QTreeWidget()

tw.setColumnCount(2)
items = [
        ('1', 'green'),
        ('add', 'eggs'),
        ('hoof', 'and'),
        ('elf', 'ham'),
        ]
tw.addTopLevelItems(map(QtGui.QTreeWidgetItem, items))

l = QtGui.QLabel()
mw.statusBar().addWidget(l)
tw.currentItemChanged.connect(lambda: l.setText(repr(tw.currentIndex())))

mw.setCentralWidget(tw)
mw.show()
app.exec_()