def __init__(self, query, parent=None): QtGui.QDialog.__init__(self, parent) self.ui = Ui_Dialog() self.ui.setupUi(self) self.query = query QtCore.QObject.connect(self.ui.comboBox, QtCore.SIGNAL("currentIndexChanged(QString)"), self.add) QtCore.QObject.connect(self.ui.comboBox_2, QtCore.SIGNAL("currentIndexChanged(QString)"), self.get_data)