Ronny Mandal schrieb:
> Hello.
>
> I am stuck; provided is the code and error-msg:
>
> file front_ui.py:
>
> class Front(object):
> _images = [] # Holds image refs to prevent GC
> def __init__(self, root):
>
>
> # Widget Initialization
> self._listbox_1 = Tkinter.Listbox(root,
> height = 0,
> width = 0,
> ...
> )
>
>
>
>
>
>
> other file:
>
> from Front_ui import Front
>
> class CustomFront(Front):
>
>
> Front._listbox_1.insert( 0, 'foo' )
>
> ...
> ...
> File "H:\My Documents\Komodo\Front.py", line 63, in CustomFront
> Front._listbox_1.insert( 0, foo' )
> AttributeError: type object 'Front' has no attribute '_listbox_1'
>
>
> i.e., it cannot find the listbox! Strange, both files is in the same
> folder. What is wrong here?
That you refer to the type/class Front with expressions like Front.<...>
instead to an _instance_ of Front. You need to do things like this:
class CustomFront(Front):
def __init__(self, root):
super(CustomFront, self).__init__(root) #now the super-classes
instance variables are there!
self._listbox_1.insert( 0, 'foo' )
Diez
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