Events not reaching script depending on how invoked

I have a script from a wxPython tutorial, which is included below. The behavior of the script changes depending on how it is invoked. Consider this image, which shows the script invoked two different ways:

The left-hand window was invoked from a terminal (GNOME Terminal 3.40.2) command line like this

$ ./

The script receives no position events, and the title bar is narrower than the other window. The right-hand window was invoked using the VSCode debugger, and it recieves poistion events, and the (x,y) coordinates change as one moves the window.

I am a little astounded that the command line invocation of he script did not work correctly, a first in my Python on Linux experience. Can anyone explain what is going on, and how to launch a wxPython script that gets events without using VSCode?

Environment Information:

Linux: Fedora 34
GNOME: 40.4.0
Widowing System: Wayland
wxPython version: 4.1.1 gtk3 (phoenix) wxWidgets 3.1.5
Python version: 3.9.6
Kernel version: 5.13.12-200.fc34.x86_64 #1 SMP Wed Aug 18 13:27:18 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

Hmmm, I have seen several other things that fail to work in the Wayland environment. I wonder if wxPython is one of these. I’ll go search the forums.

Oh, BTW, I am really liking the tutorial where I got this script. Very good for a newbie like me.

------------------- Script Source Code --------------------------------

#!/usr/bin/env python

ZetCode wxPython tutorial

This is a wx.MoveEvent event demostration.

author: Jan Bodnar
last modified: July 2020

import wx

class Example(wx.Frame):

def __init__(self, *args, **kw):
    super(Example, self).__init__(*args, **kw)


def InitUI(self):

    wx.StaticText(self, label='x:', pos=(10,10))
    wx.StaticText(self, label='y:', pos=(10,30))

    self.st1 = wx.StaticText(self, label='', pos=(30, 10))
    self.st2 = wx.StaticText(self, label='', pos=(30, 30))

    self.Bind(wx.EVT_MOVE, self.OnMove)

    self.SetSize((350, 250))
    self.SetTitle('Move event')

def OnMove(self, e):

    x, y = e.GetPosition()

def main():

app = wx.App()
ex = Example(None)

if name == ‘main’:

I found part of my answer in this post:

Wayland is involved, and in that post here is the work around:

$ GDK_BACKEND=x11 python

Using that command I get a proper window:


There is a link in the other post. I am going to read it ti find out more about this.