I'm busy trying to learn wxPython, and i'm trying to run the following
piece of code (its from the wxPyWiki tutorial):

import wx

ID_ABOUT = 101
ID_EXIT = 110

class MainWindow(wx.Frame):
def __init__(self,parent,id,title):
wx.Frame.__init__(self,parent,wx.ID_ANY,title,size =(200,100))
self.control = wx.TextCtrl(self,1,style=wx.TE_MULTILINE)
self.CreateStatusBar()

filemenu = wx.Menu()
filemenu.Append(ID_ABOUT,"&About"," Information about this
program.")
filemenu.AppendSeparator()
filemenu.Append(ID_EXIT,"E&xit"," Terminate the program.")

menuBar = wx.MenuBar()
menuBar.Append(filemenu,"&File")
self.SetMenuBar(menuBar)
self.Show(True)

app = wx.PySimpleApp()
frame = MainWindow(None, -1, "Sample editor")
app.MainLoop()

Simple enough, but every single time I try to run it IDLE gives me
this instead of the app I was hoping for:

Traceback (most recent call last):
File "C:\Documents and Settings\Enrico Jr\My Documents\Jr's Crap
\Python Stuff\Batch Picture Converter\main.py", line 24, in <module>
frame = MainWindow(None, -1, "Sample editor")
File "C:\Documents and Settings\Enrico Jr\My Documents\Jr's Crap
\Python Stuff\Batch Picture Converter\main.py", line 9, in __init__
wx.Frame.__init__(self,parent,wx.ID_ANY,title,size =(200,100))
File "C:\Python25\Lib\site-packages\wx-2.8-msw-unicode\wx
\_windows.py", line 501, in __init__
_windows_.Frame_swiginit(self,_windows_.new_Frame( *args,
**kwargs))
PyNoAppError: The wx.App object must be created first!

As far as I can tell, the wx.App object IS being created first. I
suspect a race condition of some sort here, but can anyone shed some
light on this?

teh_sAbEr wrote:

> I'm busy trying to learn wxPython, and i'm trying to run the following
> piece of code (its from the wxPyWiki tutorial):
>
> import wx
>
> ID_ABOUT = 101
> ID_EXIT = 110
>
> class MainWindow(wx.Frame):
> def __init__(self,parent,id,title):
> wx.Frame.__init__(self,parent,wx.ID_ANY,title,size =(200,100))
> self.control = wx.TextCtrl(self,1,style=wx.TE_MULTILINE)
> self.CreateStatusBar()
>
> filemenu = wx.Menu()
> filemenu.Append(ID_ABOUT,"&About"," Information about this
> program.")
> filemenu.AppendSeparator()
> filemenu.Append(ID_EXIT,"E&xit"," Terminate the program.")
>
> menuBar = wx.MenuBar()
> menuBar.Append(filemenu,"&File")
> self.SetMenuBar(menuBar)
> self.Show(True)
>
> app = wx.PySimpleApp()
> frame = MainWindow(None, -1, "Sample editor")
> app.MainLoop()
>
> Simple enough, but every single time I try to run it IDLE gives me
> this instead of the app I was hoping for:
>
> Traceback (most recent call last):
> File "C:\Documents and Settings\Enrico Jr\My Documents\Jr's Crap
> \Python Stuff\Batch Picture Converter\main.py", line 24, in <module>
> frame = MainWindow(None, -1, "Sample editor")
> File "C:\Documents and Settings\Enrico Jr\My Documents\Jr's Crap
> \Python Stuff\Batch Picture Converter\main.py", line 9, in __init__
> wx.Frame.__init__(self,parent,wx.ID_ANY,title,size =(200,100))
> File "C:\Python25\Lib\site-packages\wx-2.8-msw-unicode\wx
> \_windows.py", line 501, in __init__
> _windows_.Frame_swiginit(self,_windows_.new_Frame( *args,
> **kwargs))
> PyNoAppError: The wx.App object must be created first!
>
> As far as I can tell, the wx.App object IS being created first. I
> suspect a race condition of some sort here, but can anyone shed some
> light on this?

The main frame has to be created by the app itself, e.g. like so:


class App(wx.App):

def OnInit(self):

self._frame = MainFrame( None, -1, _APP_CAPTION)
self._frame.Show( True)
self.SetTopWindow( self._frame)
return True


def Run():
app = App()
app.MainLoop()


if __name__ == '__main__':
Run()


HTH
Thin

On Jul 13, 10:18*am, teh_sAbEr <teh.sa...@gmail.com> wrote:
> I'm busy trying to learn wxPython, and i'm trying to run the following
> piece of code (its from the wxPyWiki tutorial):
>
> import wx
>
> ID_ABOUT = 101
> ID_EXIT = 110
>
> class MainWindow(wx.Frame):
> * * def __init__(self,parent,id,title):
> * * * * wx.Frame.__init__(self,parent,wx.ID_ANY,title,size =(200,100))
> * * * * self.control = wx.TextCtrl(self,1,style=wx.TE_MULTILINE)
> * * * * self.CreateStatusBar()
>
> * * * * filemenu = wx.Menu()
> * * * * filemenu.Append(ID_ABOUT,"&About"," Information about this
> program.")
> * * * * filemenu.AppendSeparator()
> * * * * filemenu.Append(ID_EXIT,"E&xit"," Terminate the program.")
>
> * * * * menuBar = wx.MenuBar()
> * * * * menuBar.Append(filemenu,"&File")
> * * * * self.SetMenuBar(menuBar)
> * * * * self.Show(True)
>
> app = wx.PySimpleApp()
> frame = MainWindow(None, -1, "Sample editor")
> app.MainLoop()
>
> Simple enough, but every single time I try to run it IDLE gives me
> this instead of the app I was hoping for:
>
> Traceback (most recent call last):
> * File "C:\Documents and Settings\Enrico Jr\My Documents\Jr's Crap
> \Python Stuff\Batch Picture Converter\main.py", line 24, in <module>
> * * frame = MainWindow(None, -1, "Sample editor")
> * File "C:\Documents and Settings\Enrico Jr\My Documents\Jr's Crap
> \Python Stuff\Batch Picture Converter\main.py", line 9, in __init__
> * * wx.Frame.__init__(self,parent,wx.ID_ANY,title,size =(200,100))
> * File "C:\Python25\Lib\site-packages\wx-2.8-msw-unicode\wx
> \_windows.py", line 501, in __init__
> * * _windows_.Frame_swiginit(self,_windows_.new_Frame( *args,
> **kwargs))
> PyNoAppError: The wx.App object must be created first!
>
> As far as I can tell, the wx.App object IS being created first. I
> suspect a race condition of some sort here, but can anyone shed some
> light on this?

This code works "as is" on Windows XP. However, I have gotten this
error when trying to run it from IDLE and I've heard that that can
happen in other Tkinter-based IDEs. Try running it from the command
line and I'll bet you won't get that error.

Also, there's a great wxPython user's group you can join from the
official website:

www.wxpython.org

Mike

In article
<c21e91f7-2feb-4dbc-96ab-05110e3b2127@34g2000hsh.googlegroups.com>,
Mike Driscoll <kyosohma@gmail.com> wrote:

> On Jul 13, 10:18*am, teh_sAbEr <teh.sa...@gmail.com> wrote:
> > I'm busy trying to learn wxPython, and i'm trying to run the following
> > piece of code (its from the wxPyWiki tutorial):
> >
> > import wx
> >
[...]
> >
> > app = wx.PySimpleApp()
> > frame = MainWindow(None, -1, "Sample editor")
> > app.MainLoop()
> >[...]
>
> This code works "as is" on Windows XP. However, I have gotten this
> error when trying to run it from IDLE and I've heard that that can
> happen in other Tkinter-based IDEs.

So I've heard. Just for fun I tried running it in a wxPython-based
shell - it worked fine.

> Try running it from the command
> line and I'll bet you won't get that error.
>
> Also, there's a great wxPython user's group you can join from the
> official website:
>
> www.wxpython.org
>
> Mike

--
David C. Ullrich