On Mon, Jan 23, 2012 at 2:22 PM, Jonno <jonnojohn...@gmail.com> wrote: >> References inside functions are resolved when the function is called. So >> purely from what you have presented above, it would seem that 'foo' is >> defined between the call to __init__ and a later call to method1. > > > I have a strong suspicion that this is what's happening. > > Method1 is called on a button push when MainLoop is running so obviously foo > (the main wx.App) exists by then. > I must have somehow be initializing Class1 before foo = MyApp() happens.
Exactly. The line "app = MyApp(0)" creates a MyApp instance and then assigns it to "app". As part of the MyApp creation process, it creates a MyFrame, which creates a Tab, which creates a Class1, which attempts to reference "app". All of this happens before that "MyApp(0)" call has returned, so the result of that call has not actually been assigned to "app" yet. I suggest using wx.GetApp() instead. Cheers, Ian -- http://mail.python.org/mailman/listinfo/python-list
