On Mon, Jan 23, 2012 at 2:25 PM, Terry Reedy <tjre...@udel.edu> wrote:
> On 1/23/2012 2:44 PM, Jonno wrote: > >> I have a pretty complicated bit of code that I'm trying to convert to >> more clean OOP. >> >> Without getting too heavy into the details I have an object which I am >> trying to make available inside another class. The reference to the >> object is rather long and convoluted but what I find is that within my >> class definition this works: >> >> class Class1: >> def __init__(self): >> >> def method1(self): >> foo.bar.object >> >> But this tells me "global name foo is not defined": >> >> class Class1: >> def __init__(self): >> foo.bar.object >> >> Obviously I want the object to be available throughout the class (I left >> out the self.object = etc for simplicity). >> > > Perhaps you left out some relevant details. > > I'm sure I did. Part of the reason I'm not posting the whole code is that I'm trying to teach myself OOP as part of this process. I want to figure out what is wrong as much as possible by myself. I really appreciate the pointers and suggestions though. > > Any ideas why I can reference foo inside the method but not in __init__? >> > > 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. Is there a good reference on the order that things happen in python when a single script is run? In the meantime here is my stripped down script (foo = app, bar = frame, object = graph_panel). I'd welcome all suggestions to reorganize it.
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