[Tutor] communication between class instances

[Poor Yorick]

Correction:  

class menu:
   def __init__(self, app):
       self.app = app
 
   def dbtype(self):
       self.app.dbtype = 'metakit'




Poor Yorick wrote:

> Hi,
>
> I've been studying Python for several months now, and it is my first 
> attempt to learn how to program in any language.  I've been trying 
> lately to understand some of the nuances of object oriented 
> programming, but most of the resources on the web require some 
> knowledge of c++ to gist.  So, I'm turning to this list :)  Direct 
> answers or pointers to reference material about this question would be 
> greatly appreciated:
>
> Say I have the following classes:
>
>
> class app:
>    def __init(self):
>        self.dbtype = None
>        self.gui=gui(self)
>
> class gui:
>    def __init__(self, app):
>        self.app = app
>        self.main_menu = menu(self.app)
>
> class menu:
>    def __init__(self, app):
>        self.app = app
>          def dbtype(self):
>        app.dbtype = 'metakit'
>
>
> So far, instantiating classes and passing references to all other 
> class instances that the instance will need to communicate with is the 
> only way I've come up with to get class instances to communicate with 
> each other.  This seems unwieldy and not really modular.  Is there a 
> better way to pass data between class instances?  One thing I really 
> don't like is having to pass a reference to the app instance all the 
> way down to the menu instance, which really should only be aware of 
> the gui instance which instantiates it. Right?
>
> Right?
>
> I'm very confused...
>
> Poor Yorick
> gp@pooryorick.com
>
>
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