bitmap - Error when using wx.StaticBitmap.SetBitmap -

i wrote program in python can download pictures web. every downloaded picture doing preview of picture in gui every time receive following error:

traceback (most recent call last):   file "/usr/lib/python2.7/site-packages/wx-2.8-gtk2-unicode/wx/_core.py", line 14665, in <lambda>     lambda event: event.callable(*event.args, **event.kw) ) typeerror: 'nonetype' object not callable traceback (most recent call last):   file "/usr/lib/python2.7/site-packages/wx-2.8-gtk2-unicode/wx/_core.py", line 14665, in <lambda>     lambda event: event.callable(*event.args, **event.kw) ) typeerror: 'nonetype' object not callable traceback (most recent call last):   file "/usr/lib/python2.7/site-packages/wx-2.8-gtk2-unicode/wx/_core.py", line 14665, in <lambda>     lambda event: event.callable(*event.args, **event.kw) ) typeerror: 'nonetype' object not callable traceback (most recent call last):   file "/usr/lib/python2.7/site-packages/wx-2.8-gtk2-unicode/wx/_core.py", line 14665, in <lambda>     lambda event: event.callable(*event.args, **event.kw) ) typeerror: 'nonetype' object not callable 

funny thing: still works. error mean? , how can fix it?

the code causing error should line:

wx.callafter(self.image.setbitmap, wx.bitmapfromimage(wx.image(imagepath, wx.bitmap_type_any).rescale(width, height))) 

i couldn't reproduce problem following code:

#!/usr/bin/env python  import wx  class frame(wx.frame):     def __init__(self):         wx.frame.__init__(self, none, title="title")          panel = wx.panel(self)         box = wx.boxsizer(wx.vertical)          button = wx.button(panel, wx.id_any, "load image")         button.bind(wx.evt_button, self.changeimage)         box.add(button, 0, wx.all, 10)          self.image = wx.staticbitmap(panel)         box.add(self.image, 0, wx.all, 10)          panel.setsizer(box)         panel.layout()      def changeimage(self, event):         wx.callafter(self.image.setbitmap, wx.bitmapfromimage(wx.image("modernart.png", wx.bitmap_type_any).rescale(150, 150)))  if __name__ == "__main__":     app = wx.app()     top = frame()     top.show()     app.mainloop() 

(you need modernart.png image in same folder. i'll leave create it.)

if replaced self.image.setbitmap in call wx.callafter none, able reproduce error.

are calling wx.callafter somewhere other line you've shown above?