def InitWindow(self): self.setWindowIcon(QtGui.QIcon("icon.png")) self.setWindowTitle(self.title) self.setGeometry(self.left, self.top, self.width, self.height) self.setStyleSheet("background-color:yellow") vbox = QVBoxLayout() toolbox = QToolBox() vbox.addWidget(toolbox) label = QLabel() toolbox.addItem(label, "Python") toolbox.setFont(QtGui.QFont("Sanserif", 15)) label = QLabel() toolbox.addItem(label, "Java") label = QLabel() toolbox.addItem(label, "C++") self.setLayout(vbox) self.show()