Как передавать значения между окнами

import sys
from PyQt5 import QtWidgets, QtCore, QtGui
import test2, test3
 
class OneWindow(QtWidgets.QMainWindow, test2.Ui_MainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setupUi(self)
        self.listWidget.itemDoubleClicked.connect(self.selectionChanged)
 
    def selectionChanged(self, item):
        if item.text()=="1":
            self.check2()
        elif item.text()=="2":
            quit()
 
    def check2(self):
        self.close()       
        self.twoWindow = TwoWindow(data)
        self.twoWindow.show()
        
class TwoWindow(QtWidgets.QMainWindow, test3.Ui_MainWindow):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        self.oneWindow = None
 
        
 
def main():
    app = QtWidgets.QApplication(sys.argv)
    window = OneWindow()
    window.show()
    sys.exit(app.exec_())
 
        
if __name__ == "__main__":
    main()

from PyQt5 import QtCore, QtGui, QtWidgets
 
 
class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setObjectName("verticalLayout")
        self.listWidget = QtWidgets.QListWidget(self.centralwidget)
        self.listWidget.setObjectName("listWidget")
        item = QtWidgets.QListWidgetItem()
        self.listWidget.addItem(item)
        item = QtWidgets.QListWidgetItem()
        self.listWidget.addItem(item)
        item = QtWidgets.QListWidgetItem()
        self.listWidget.addItem(item)
        item = QtWidgets.QListWidgetItem()
        self.listWidget.addItem(item)
        item = QtWidgets.QListWidgetItem()
        self.listWidget.addItem(item)
        item = QtWidgets.QListWidgetItem()
        self.listWidget.addItem(item)
        self.verticalLayout.addWidget(self.listWidget)
        MainWindow.setCentralWidget(self.centralwidget)
 
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
 
    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        __sortingEnabled = self.listWidget.isSortingEnabled()
        self.listWidget.setSortingEnabled(False)
        item = self.listWidget.item(0)
        item.setText(_translate("MainWindow", "1"))
        item = self.listWidget.item(1)
        item.setText(_translate("MainWindow", "2"))
        item = self.listWidget.item(2)
        item.setText(_translate("MainWindow", "3"))
        item = self.listWidget.item(3)
        item.setText(_translate("MainWindow", "4"))
        item = self.listWidget.item(4)
        item.setText(_translate("MainWindow", "5"))
        item = self.listWidget.item(5)
        item.setText(_translate("MainWindow", "6"))
        self.listWidget.setSortingEnabled(__sortingEnabled)

from PyQt5 import QtCore, QtGui, QtWidgets
 
 
class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(80, 30, 113, 20))
        self.lineEdit.setReadOnly(True)
        self.lineEdit.setObjectName("lineEdit")
        self.lineEdit_2 = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit_2.setGeometry(QtCore.QRect(80, 60, 113, 20))
        self.lineEdit_2.setObjectName("lineEdit_2")
        self.lineEdit_3 = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit_3.setGeometry(QtCore.QRect(80, 100, 113, 20))
        self.lineEdit_3.setObjectName("lineEdit_3")
        self.lineEdit_4 = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit_4.setGeometry(QtCore.QRect(80, 140, 113, 20))
        self.lineEdit_4.setObjectName("lineEdit_4")
        MainWindow.setCentralWidget(self.centralwidget)
 
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
 
    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.lineEdit.setText(_translate("MainWindow", "123"))