如何在将PyQt5按钮连接到函数时使用lambda

from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton
from PyQt5.QtCore import Qt

class MyWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        self.initUI()

    def initUI(self):
        # 创建一个按钮
        btn = QPushButton("Click me", self)
        btn.move(50, 50)

        # 使用lambda连接按钮的clicked信号到自定义函数
        btn.clicked.connect(lambda: self.buttonClicked(btn))

    def buttonClicked(self, btn):
        btn.setText("Clicked!")

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