from PyQt5 import QtCore, QtGui, QtWidgets
from LoginTemplate2 import Ui_LoginTemplate
from Mainview2 import Ui_PyOnePass
import Mainview2

import sys
class myUi(Mainview2.Ui_PyOnePass):

    def addTemplateWidget(self):
        # *https://stackoverflow.com/questions/36654225/pyqt5-add-custom-qwidget-to-qlayout
        # https://stackoverflow.com/questions/8651742/dynamically-adding-and-removing-widgets-in-pyqt
        # *https://stackoverflow.com/questions/46637836/pyqt5-updated-widget-is-not-added-to-the-layout-though-the-widget-is-updated

        LoginTemplate = QtWidgets.QWidget()
        self.ui = Ui_LoginTemplate()
        self.ui.setupUi(LoginTemplate)

        # add Template-Widget 
        self.horizontalLayout.addWidget(LoginTemplate)

        # filling widgets:
        self.ui.tbUsrName.setText('Username')
        



app = QtWidgets.QApplication(sys.argv)
popMainWin = QtWidgets.QMainWindow()
ui = myUi()

ui.eerrtt()

ui.setupUi(ui)
ui.addTemplateWidget()
ui.show()
sys.exit(app.exec_())