def __init__(self, parent=None): QtGui.QWidget.__init__(self, parent) self.ui = Ui_MainWindow() #框主题名称 self.ui.setupUi(self) QtCore.QObject.connect(self.ui.lineEdit, QtCore.SIGNAL('returnPressed()'), self.Go) QtCore.QObject.connect(self.ui.pushButton, QtCore.SIGNAL("clicked()"), self.Go) QtCore.QObject.connect(self.ui.comboBox, QtCore.SIGNAL("currentIndexChanged(int)"), self.mode) QtCore.QObject.connect(self.ui.pushButton_2, QtCore.SIGNAL("clicked()"), self.file_dialog)