Is it true that the development of wxPython is dead?

Not quite dead!

http://xoomer.virgilio.it/infinity77/Phoenix/main.html

Yes, project Phoenix does rewrite all the wxPython code to make it work with Python2 and Python3.

For old time sake, some fun with colors:

# color a wxPython panel every 2.5 seconds with a random color

import wx
import random
from wx.lib.colourdb import *

class MyFrame(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title, size=(600, 450))

        self.panel = wx.Panel(self, -1)
        # create a list of wx colors (from wx.lib.colourdb)
        self.colors = getColourList()
        self.timer = wx.Timer(self)
        self.Bind(wx.EVT_TIMER, self.OnTimer, self.timer)
        # milliseconds
        self.timer.Start(2500)
        self.Center()

    def OnTimer(self, event):
        self.panel.SetBackgroundColour(wx.RED)
        # pick a random color from the list
        color = random.choice(self.colors)
        self.panel.SetBackgroundColour(color)
        self.panel.Refresh()
        self.SetTitle(color)


app = wx.App(0)
# contains all the wx color names (from wx.lib.colourdb)
updateColourDB()
# create the frame instance
frame = MyFrame(None, -1, 'randomcolours.py')
frame.Show(True)
app.SetTopWindow(frame)
app.MainLoop()