在不重新启动的情况下重新初始化PyQt5应用程序(用于使用squish进行图形用户界面测试)

from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton
import sys

def reset_application():
    # 关闭所有打开的窗口和对话框
    for widget in QApplication.topLevelWidgets():
        widget.close()

    # 处理所有待处理的事件
    QApplication.processEvents()

    # 重新初始化应用程序
    app = QApplication(sys.argv)
    main_window = QMainWindow()
    button = QPushButton("Click me", main_window)
    main_window.show()

    # 启动应用程序的事件循环
    sys.exit(app.exec_())

if __name__ == "__main__":
    app = QApplication(sys.argv)
    main_window = QMainWindow()
    button = QPushButton("Reset Application", main_window)
    button.clicked.connect(reset_application)
    main_window.show()
    sys.exit(app.exec_())