Overloading virtual method of widget without inheriting (PyQt)

[Alex Gusarov]

> class MultiHandler(object):
>        def __init__(self, owner, *initial_handlers):
> ...
> ...
> ...
> calendar = Calendar()
> calendar.on_paint = MultiHandler(calendar, Calendar.on_paint)
>
> calendar.on_paint()
> calendar.on_paint += handler1
> calendar.on_paint()
> calendar.on_paint += handler2
> calendar.on_paint()

Marek, this seems exactly what I want, thanks, I will try it.
Thanks everybody. Yes, I'm newbie, so may be it was a dumb question,
don't judge me.

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Best regards, Alex Gusarov