self.itemSelectionChanged.connect(self.print_row)

def print_row(self):
    items = self.selectedItems()
print(str(items[0].text()))

def main(args):
    app = QtGui.QApplication(args)
table = MyTable(mystruct, 3, 3)
table.show()
sys.exit(app.exec_())
if __name__ == '__main__':
    main(sys.argv)
QTableWidget Current Selection Change Signal