Wing IDE Pro trace back error but not on Eclipse/Pydev

[Devl Infonews]

Hi,

I am just learning Python and wxPython.  Meanwhile I am also trying out Wing IDE Pro and Eclipse/Pydev and running through some of the example off of Noel Rappin's book wxPython in Action.  The problem is I get the trace back error on Wing IDE but not on the Eclipse/Pydev IDE.  Here is the code that simply tells the apps to redirect stdout and stderr:

#!/usr/bin/env python

import wx

import sys

class Frame(wx.Frame):

    def __init__(self, parent, id, title):

        print "Frame __init__"

        wx.Frame.__init__(self, parent, id, title)

class App(wx.App):

    def __init__(self, redirect=True, filename=None):

        print "App __init__"

        wx.App.__init__(self, redirect, filename)

    def OnInit(self):

        print "OnInit"

        self.frame = Frame(parent=None, id=-1, title='Startup')

        self.frame.Show()

        self.SetTopWindow(self.frame)

        print >> sys.stderr, "A pretend error message"

        return True

    def OnExit(self):

        print "OnExit"

if __name__ == '__main__':

    app = App(redirect=True)

    print "before MainLoop"

    app.MainLoop()

    print "after MainLoop"

The error occurs when I close the last window.  Wing points me to _windows.py on line 505.  The trace back message is:

TypeError: in method 'new_Frame', expected argument 1 of type 'wxWindow *'

File "..../

File "/Users/melton/work/Python/wxPython/Stdout-redirect.py", line 27, in <module>

  app.MainLoop()

File "//usr/local/lib/wxPython-ansi-2.8.8.0/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_core.py", line 7941, in MainLoop

  wx.PyApp.MainLoop(self)

File "//usr/local/lib/wxPython-ansi-2.8.8.0/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_core.py", line 7267, in MainLoop

  return _core_.PyApp_MainLoop(*args, **kwargs)

File "/Users/melton/work/Python/wxPython/Stdout-redirect.py", line 22, in OnExit

  print "OnExit"

File "//usr/local/lib/wxPython-ansi-2.8.8.0/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_core.py", line 7774, in write

  self.CreateOutputWindow(text)

File "//usr/local/lib/wxPython-ansi-2.8.8.0/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_core.py", line 7748, in CreateOutputWindow

  style=wx.DEFAULT_FRAME_STYLE)

File "//usr/local/lib/wxPython-ansi-2.8.8.0/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_windows.py", line 505, in __init__

  _windows_.Frame_swiginit(self,_windows_.new_Frame(*args, **kwargs))

Why does it occur on Wing and not on Eclipse/Pydev?  I would be very happy with Wing IDE If this is a wxPython error that it caught.

My environment:

PowerPC Mac OS X 10.4.11

Python 2.5.2 - MacPython distribution from from python.org

wxPython 2.8.8.0

Wing IDE Pro 3.1.2-1

Eclipse 3.4

Pydev 1.3.18

Mel

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[Wingware Support]

Devl Infonews wrote:
> I am just learning Python and wxPython.  Meanwhile I am also trying out
> Wing IDE Pro and Eclipse/Pydev and running through some of the example
> off of Noel Rappin's book wxPython in Action.  The problem is I get the
> trace back error on Wing IDE but not on the Eclipse/Pydev IDE.
...
> The error occurs when I close the last window.  Wing points me to
> _windows.py on line 505.  The trace back message is:
>
> TypeError: in method 'new_Frame', expected argument 1 of type 'wxWindow *'
...
> "//usr/local/lib/wxPython-ansi-2.8.8.0/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_windows.py",
> line 505, in __init__
>   _windows_.Frame_swiginit(self,_windows_.new_Frame(*args, **kwargs))
>
> Why does it occur on Wing and not on Eclipse/Pydev?  I would be very
> happy with Wing IDE If this is a wxPython error that it caught.

What happens if you select "Ignore this exception location" in the Exceptions tool
and continue debugging?  Does it work?

It may be that this is a real error that is somehow masked / swallowed normally --
that seems somewhat likely since the app is exiting anyway when you close the last
window and thus this may not normally be noticed.

You can remove the ignored exception entry again if needed using the Clear Ignored
Exceptions item in the Debug menu.

If this doesn't help, please let me know and we can try to take a closer look at
it.

Thanks,

--

Stephan Deibel
Wingware | Python IDE
Advancing Software Development

www.wingware.com

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[yahody]

Devl Infonews wrote:

> Hi,
>
> I am just learning Python and wxPython.  Meanwhile I am also trying
> out Wing IDE Pro and Eclipse/Pydev and running through some of the
> example off of Noel Rappin's book wxPython in Action.  The problem is
> I get the trace back error on Wing IDE but not on the Eclipse/Pydev
> IDE.  Here is the code that simply tells the apps to redirect stdout
> and stderr:
>
> #!/usr/bin/env python
>
> import wx
> import sys
>
> class Frame(wx.Frame):
>     def __init__(self, parent, id, title):
>         print "Frame __init__"
>         wx.Frame.__init__(self, parent, id, title)
> class App(wx.App):
>     def __init__(self, redirect=True, filename=None):
>         print "App __init__"
>         wx.App.__init__(self, redirect, filename)
>     def OnInit(self):
>         print "OnInit"
>         self.frame = Frame(parent=None, id=-1, title='Startup')
>         self.frame.Show()
>         self.SetTopWindow(self.frame)
>         print >> sys.stderr, "A pretend error message"
>         return True
>     def OnExit(self):
>         print "OnExit"
>
> if __name__ == '__main__':
>     app = App(redirect=True)
>     print "before MainLoop"
>     app.MainLoop()
>     print "after MainLoop"
>
> The error occurs when I close the last window.  Wing points me to
> _windows.py on line 505.  The trace back message is:
>
> TypeError: in method 'new_Frame', expected argument 1 of type 'wxWindow *'
> File "..../
> File "/Users/melton/work/Python/wxPython/Stdout-redirect.py", line 27,
> in <module>
>   app.MainLoop()
> File
> "//usr/local/lib/wxPython-ansi-2.8.8.0/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_core.py",
> line 7941, in MainLoop
>   wx.PyApp.MainLoop(self)
> File
> "//usr/local/lib/wxPython-ansi-2.8.8.0/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_core.py",
> line 7267, in MainLoop
>   return _core_.PyApp_MainLoop(*args, **kwargs)
> File "/Users/melton/work/Python/wxPython/Stdout-redirect.py", line 22,
> in OnExit
>   print "OnExit"
> File
> "//usr/local/lib/wxPython-ansi-2.8.8.0/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_core.py",
> line 7774, in write
>   self.CreateOutputWindow(text)
> File
> "//usr/local/lib/wxPython-ansi-2.8.8.0/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_core.py",
> line 7748, in CreateOutputWindow
>   style=wx.DEFAULT_FRAME_STYLE)
> File
> "//usr/local/lib/wxPython-ansi-2.8.8.0/lib/python2.5/site-packages/wx-2.8-mac-ansi/wx/_windows.py",
> line 505, in __init__
>   _windows_.Frame_swiginit(self,_windows_.new_Frame(*args, **kwargs))
>
> Why does it occur on Wing and not on Eclipse/Pydev?  I would be very
> happy with Wing IDE If this is a wxPython error that it caught.
>
> My environment:
> PowerPC Mac OS X 10.4.11
> Python 2.5.2 - MacPython distribution from from python.org
> <http://python.org>
> wxPython 2.8.8.0 <http://2.8.8.0>
> Wing IDE Pro 3.1.2-1
> Eclipse 3.4
> Pydev 1.3.18
>
>
> Mel

This runs fine on my Windows XP box from Wing Pro 3.1.2-1, wxPython
2.8.8.0, Python 2.5. I only see the error when I close it. The code
looks correct though. It seems to be stemming from the redirected text
frame when it is closed. This is probably due to the fact that the
original frame was closed before it was. My guess is that the wx.App
object is a parent of some sort for the redirect frame and when you
close the app BEFORE the redirect, you end up with an error.

You should probably post to the wxPython user's group about it, although
I think it's harmless.

Mike
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