PyQt5实现从主窗口打开子窗口的方法

#-*- coding:utf-8 -*-from PyQt5.QtWidgets import QMainWindow, QApplicationfrom window import Ui_MainWindowfrom child import Ui_Childimport sys class Main(QMainWindow,Ui_MainWindow):  def __init__(self):    super(Main, self).__init__()    self.setupUi(self) class Child(QMainWindow,Ui_Child):  def __init__(self):    super(Child, self).__init__()    self.setupUi(self)    self.pushButton.clicked.connect(self.close)  def OPEN(self):    self.show() if __name__ =="__main__":  app = QApplication(sys.argv)  main = Main()  ch = Child()  main.show()  main.pushButton.clicked.connect(ch.OPEN)  sys.exit(app.exec_())