Pseud O'Nym wrote:
> the following fragment doesn't cause any errors and results in buttons the
> correct size for the images, but the buttons don't work, and the images
> aren't displayed. If I add a text property, and remove the images, they
> work fine, so the rest of my code's OK. I've searched this group and
> Python.org to no avail.
>
> class App:
> def __init__(self, master):
> frame = Frame(master)
> frame.pack(side=LEFT, fill=Y)
> image1 = PhotoImage(file='button_a.gif')
> self.button = Button(frame, image=image1)
> self.button.pack(side=TOP)
self.image = image1
> Can anyone enlighten me?
For reasons that are beyond me widgets do not increase the reference count
of a PhotoImage. Therefore you have to put a reference to the image
elsewhere, e. g. into the App instance, to prevent it from being
garbage-collected when the image1 variable goes out of scope.
Peter
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