Open second window from main with pyqt5 and qt designer - qt

Question

I'm creating an application with two windows using pyqt5 and QtDesigner. A button on the main window "MainWindow.ui" should open a second window from the file "age_entry.ui" but I seem to be missing something. Clicking the button on the first form produces this error":
Exception "unhandled TypeError"
QDialog(parent: QWidget = None, flags: Union[Qt.WindowFlags, Qt.WindowType] = Qt.WindowFlags()): argument 1 has unexpected type 'bool'
Here is the code for the main window:
# -*- coding: utf-8 -*-
import sys
from PyQt5 import uic, QtWidgets
Ui_MainWindow, QtBaseClass = uic.loadUiType("MainWindow.ui")
LandingPageUI, LandingPageBase = uic.loadUiType("age_entry.ui")
class MyApp(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self):
QtWidgets.QMainWindow.__init__(self)
Ui_MainWindow.__init__(self)
self.setupUi(self)
def showAgeEntryForm(self):
self.child_win = AgeEntryForm(self)
self.child_win.show()
self.btnOpenAges.clicked.connect(showAgeEntryForm)
class AgeEntryForm(LandingPageBase, LandingPageUI):
def __init__(self, parent=None):
LandingPageBase.__init__(self, parent)
self.setupUi(self)
if __name__ == "__main__":
app=QtWidgets.QApplication.instance()
if not app:
app = QtWidgets.QApplication(sys.argv)
window = MyApp()
window.show()
sys.exit(app.exec_())
Thanks in advance!
Here is the MainWindow and age_entry file in code form:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'MainWindow.ui'
#
# Created by: PyQt5 UI code generator 5.7
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(526, 338)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.label_9 = QtWidgets.QLabel(self.centralwidget)
self.label_9.setGeometry(QtCore.QRect(90, 10, 341, 41))
font = QtGui.QFont()
font.setPointSize(16)
font.setBold(True)
font.setWeight(75)
self.label_9.setFont(font)
self.label_9.setObjectName("label_9")
self.btnOpenAges = QtWidgets.QPushButton(self.centralwidget)
self.btnOpenAges.setGeometry(QtCore.QRect(130, 90, 181, 61))
self.btnOpenAges.setObjectName("btnOpenAges")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 526, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.label_9.setText(_translate("MainWindow", "Ageing Session Management"))
self.btnOpenAges.setText(_translate("MainWindow", "Enter Ages"))
And the age_entry.ui
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'age_entry.ui'
#
# Created by: PyQt5 UI code generator 5.7
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(350, 189)
self.label_13 = QtWidgets.QLabel(Dialog)
self.label_13.setGeometry(QtCore.QRect(90, 20, 451, 61))
font = QtGui.QFont()
font.setPointSize(14)
self.label_13.setFont(font)
self.label_13.setObjectName("label_13")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
self.label_13.setText(_translate("Dialog", "Age Entry Form"))

Answer 1

Two issues your indentation is wrong. Secondly your missing self. on showAgeEntryForm. Try this:
def __init__(self):
QtWidgets.QMainWindow.__init__(self)
Ui_MainWindow.__init__(self)
self.setupUi(self)
self.btnOpenAges.clicked.connect(self.showAgeEntryForm)
def showAgeEntryForm(self):
self.child_win = AgeEntryForm(self)
self.child_win.show()