[Python] How can I close and open a new window? [duplicate]

I try to close and open a windows using PyQt5 and the following code:

import PyQt5.QtWidgets as qtw
from PyQt5 import uic
import sys
import os

class Window2(qtw.QMainWindow):
def __init__(self):
super().__init__()
uic.loadUi("window2.ui",self)

class MainWindow(qtw.QMainWindow):
def __init__(self):
super().__init__()
uic.loadUi("selectWindow.ui",self)
self.path = os.path.abspath(os.path.dirname(sys.argv[0]))
self.pbStart.clicked.connect(self.showData)

def showData(self):
print(self.leInput.text())
self.w = Window2()
self.w.show()
self.hide()

if __name__ == '__main__':
app = qtw.QApplication(sys.argv)
win = MainWindow()
win.show()
sys.exit(app.exec_())


The first windows appears, I can enter some value and press the button, but then I get the following error:

$ python selectWindow.py
3
Traceback (most recent call last):
File "D:\DEV\Fiverr2024\TRY\artfulrooms\selectWindow.py", line 20, in showData
self.w = Window2()
^^^^^^^^^
File "D:\DEV\Fiverr2024\TRY\artfulrooms\selectWindow.py", line 9, in __init__
uic.loadUi("window2.ui",self)
File "D:\DEV\.venv\pyqt\Lib\site-packages\PyQt5\uic\__init__.py", line 241, in loadUi
return DynamicUILoader(package).loadUi(uifile, baseinstance, resource_suffix)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\DEV\.venv\pyqt\Lib\site-packages\PyQt5\uic\Loader\loader.py", line 66, in loadUi
return self.parse(filename, resource_suffix)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\DEV\.venv\pyqt\Lib\site-packages\PyQt5\uic\uiparser.py", line 1037, in parse
actor(elem)
File "D:\DEV\.venv\pyqt\Lib\site-packages\PyQt5\uic\uiparser.py", line 822, in createUserInterface
self.toplevelWidget = self.createToplevelWidget(cname, wname)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\DEV\.venv\pyqt\Lib\site-packages\PyQt5\uic\Loader\loader.py", line 57, in createToplevelWidget
raise TypeError(
TypeError: ('Wrong base class of toplevel widget', (<class '__main__.Window2'>, 'QDialog'))


How can I close the actual windows and open the new window2?

Continue reading...