How do I fix a "memory leak of type 'wxPyXmlSubclassFactory *', no destructor found" error from wxPython/wxFormBuilder?
Question: I'm trying to follow [this
tutorial](http://vcansimplify.wordpress.com/2013/04/08/ultra-quick-guis-with-
wxformbuilderpython/) to quickly make simple GUIs using wxPython and
wxFormBuilder.

Using the wxFormBuilder, I created a super simple frame with one vertical
layout, one edit text control and a button, which only clears the value of the
text control. WxFormBuilder generated the Python code and I just added a few
lines to clear the value of the text control when the button is clicked. Here
is an image of the stupid simple frame.

![simple frame](http://i.stack.imgur.com/BaDdc.png)

When I run this file in Python, the GUI does clear the text I type in the text
control. When I click on the Frame's close button, I see this:

`swig/python detected a memory leak of type 'wxPyXmlSubclassFactory *', no
destructor found.`

I tried Googling the issue but only found that Python is dynamic enough to not
require destructors. I did try out adding the `__del__` function, but I still
got the same error message.

Ideas for getting rid of that error? I'm using:

  * Python 2.7.6
  * wxPython 3.0.0.0 for Python 2.7
  * wxFormBuilder 3.4.2
  * Windows 7, 32-bit

Thank you so much in advance!

Here's the code I have if anyone needs it:

    
    
    # -*- coding: utf-8 -*- 
    
    ###########################################################################
    ## Python code generated with wxFormBuilder (version Feb 26 2014)
    ## http://www.wxformbuilder.org/
    ##
    ## PLEASE DO "NOT" EDIT THIS FILE!
    ###########################################################################
    
    import wx
    import wx.xrc
    
    ###########################################################################
    ## Class MyFrame1
    ###########################################################################
    
    class MyFrame1 ( wx.Frame ):
    
        def __init__( self, parent ):
            wx.Frame.__init__ ( self, parent, id = wx.ID_ANY, title = wx.EmptyString, pos = wx.DefaultPosition, size = wx.Size( 203,155 ), style = wx.DEFAULT_FRAME_STYLE|wx.TAB_TRAVERSAL )
    
            self.SetSizeHintsSz( wx.DefaultSize, wx.DefaultSize )
    
            bSizer1 = wx.BoxSizer( wx.VERTICAL )
    
            self.edit = wx.TextCtrl( self, wx.ID_ANY, wx.EmptyString, wx.DefaultPosition, wx.DefaultSize, 0 )
            bSizer1.Add( self.edit, 1, wx.ALL|wx.EXPAND, 5 )
    
            self.clearButton = wx.Button( self, wx.ID_ANY, u"Clear", wx.DefaultPosition, wx.DefaultSize, 0 )
            bSizer1.Add( self.clearButton, 1, wx.ALL|wx.EXPAND, 5 )
    
    
            self.SetSizer( bSizer1 )
            self.Layout()
    
            self.Centre( wx.BOTH )
    
            # Connect Events
            self.clearButton.Bind( wx.EVT_BUTTON, self.clearFunc )
    
        def __del__( self ):
            pass
    
    
        # Virtual event handlers, overide them in your derived class
        def clearFunc( self, event ):
            event.Skip()
    
    class SimpleFrame(MyFrame1):
        def __init__(self,parent):
            MyFrame1.__init__(self,parent)
    
        def clearFunc(self,event):
            self.edit.SetValue("")
    
    app = wx.App(False)
    frame = SimpleFrame(None)
    frame.Show(True)
    app.MainLoop()
    


Answer: I keep getting the same error with the latest version (3.0.0). No new
version's been released since. No need to worry though. Expect to see a fix
sometime soon.

Take a look at the last post [here](http://wxpython-
users.1045709.n5.nabble.com/ANNOUNCE-wxPython-3-0-0-0-td5719588.html)

