Splash

Splash is not frame window. It needs parent frame, and IT CLOSES PARENT WINDOW on close.

import wx

app = wx.PySimpleApp()
frame = wx.Frame(None, size=(1200, 1600))

image = wx.Bitmap('splash.jpg', wx.BITMAP_TYPE_JPEG)
splash_frame = wx.Frame(None,
                        size=image.GetSize(),
                        style=wx.NO_BORDER
                        )
splash = wx.SplashScreenWindow(parent=splash_frame, 
                               bitmap=image, id=-1,
                               size=image.GetSize(),
                               pos=wx.DefaultPosition)
frame.Show()
splash_frame.Show()
splash_frame.Centre()
app.MainLoop()