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Re: Using an object inside a class

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  Re: Using an object inside a class Ian Kelly <ian.g.kelly@gmail.com> - 2012-01-23 14:42 -0700

#19290 — Re: Using an object inside a class

On Mon, Jan 23, 2012 at 2:22 PM, Jonno <jonnojohnson@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

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