[Tkinter-discuss] Callbacks to classes

[Bob van der Poel]

New to list ... hope it's not been covered before, and on topic ....

Anyway, I've got a number of programs which suddenly stopped working.
I think due to a change from python 2.6 to 2.7.

I was setting up a menu call back to a Class with code like:

    Button(bf, text=txt, height=1, command=cmd).grid(column=c, row=0, pady=5)

when 'cmd' was a simple class name. Doesn't work anymore :)

However, if I change cmd to a lambda it's find.

Sorry, this isn't a better (simple) example ... I'm pulling code out a
non-trivial application I've been running for several years. But, most
simply I'd have something like:

 Class foo:
   ... init, and present a options window, etc.
   --- set a call back to delete the window when done.

Setting 'cmd' to 'foo' doesn't work anymore. However,

 cmd = lambda:foo()

solves the issue.

I'm thinking I've been doing it wrong all along?

Best,

-- 
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Bob van der Poel ** Wynndel, British Columbia, CANADA **
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