如何在python中连接Qcombobox和pyqt5创建的键盘

from PyQt5.QtWidgets import QApplication, QMainWindow, QComboBox
from PyQt5.QtGui import QKeySequence
from PyQt5.QtCore import Qt

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        # 创建一个QComboBox对象
        self.comboBox = QComboBox(self)
        self.comboBox.setGeometry(50, 50, 200, 30)

        # 添加选项
        self.comboBox.addItem("Option 1")
        self.comboBox.addItem("Option 2")
        self.comboBox.addItem("Option 3")

        # 连接信号和槽函数
        self.comboBox.activated.connect(self.onComboBoxActivated)

    def onComboBoxActivated(self, index):
        # 获取选中的文本
        selected_text = self.comboBox.currentText()
        print("Selected:", selected_text)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    mainWindow = MainWindow()
    mainWindow.show()
    sys.exit(app.exec_())