wxPython: Name error

Question

I'm trying to follow Listing 1.3 from the book 'wxPython in action'.

I believe I've written an exact copy of the code:

"""Hello, wxPython! program.""" import wx class Frame(wx.Frame): """Frame class that displays an image.""" def __init__(self,image, parent=None, id=-1, pos=wx.DefaultPosition, title='Hello, wxPython!'): """Create a Frame instance and display image.""" temp = image.ConvertToBitmap() size = temp.GetWidth(), temp.GetHight() wx.Frame.__init__(self, parent, id, title, pos, size) self.bmp = wx.StaticBitmap(parent = self, bitmap = temp) class App(wx.App): """Application class.""" def OnInit(self): image = wx.Image('wxPython.jpg', wx.BITMAP_TYPE_JPEG) self.frame = Frame(image) self.frame.Show() self.SetTopWindow(self.frame) return True def main(): app = App() app.MainLoop() if __name__ == '__main__': main()

...but I get the following error message when I run the code:

>>> Traceback (most recent call last): File "<string>", line 254, in run_nodebug File "\\ri-file-2\cst$\image.py", line 28, in <module> class App(wx.App): File "\\ri-file-2\cst$\image.py", line 43, in App main() File "\\ri-file-2\cst$\image.py", line 39, in main app = App() NameError: global name 'App' is not defined >>>

Can anybody figure out what's wrong - thx in advance.

Andrey Sobolev · Accepted Answer · 2013-09-02 09:10:17Z

Your main subroutine and if __name__ == '__main__' bit now belong to App class due to wrong indentation. Take them out by deleting preceding four spaces:

 ... self.SetTopWindow(self.frame) return True def main(): app = App() app.MainLoop() if __name__ == '__main__': main()

Also, make sure that you have wxPython.jpg file in the program folder, otherwise the program won't run.

PS. In this line of the code:

 size = temp.GetWidth(), temp.GetHight()

it should be GetHeight() instead of GetHight().

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