如何使用PYQT在按钮上一个接一个地运行一个函数

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QVBoxLayout

class MyApp(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle('PYQT Button Sequence Example')

        # 创建按钮
        self.button = QPushButton('Run Functions', self)
        self.button.clicked.connect(self.run_functions)

        # 创建布局并添加按钮
        layout = QVBoxLayout()
        layout.addWidget(self.button)

        self.setLayout(layout)

    def run_functions(self):
        self.function1()
        self.function2()
        self.function3()

    def function1(self):
        print("Function 1 executed")

    def function2(self):
        print("Function 2 executed")

    def function3(self):
        print("Function 3 executed")

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

pip install PyQt5