使用pyqt5 mvc进行窗口切换

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

class Model:
    def __init__(self):
        self.data = []

    def add_data(self, item):
        self.data.append(item)

class View:
    def __init__(self):
        self.window1 = QMainWindow()
        self.window2 = QMainWindow()
        self.button1 = QPushButton("Switch to Window 2", self.window1)
        self.button2 = QPushButton("Switch to Window 1", self.window2)

class Controller:
    def __init__(self, model, view):
        self.model = model
        self.view = view
        self.view.button1.clicked.connect(self.switch_to_window2)
        self.view.button2.clicked.connect(self.switch_to_window1)

    def switch_to_window2(self):
        self.view.window1.hide()
        self.view.window2.show()

    def switch_to_window1(self):
        self.view.window2.hide()
        self.view.window1.show()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    model = Model()
    view = View()
    controller = Controller(model, view)
    view.window1.show()
    sys.exit(app.exec_())