[Tutor] __init__

[vicki@stanfield.net]

I think I am missing some very basic knowledge with
regard to my Python/Tkinter programming which is
preventing me from understanding the examples that I
find. First the __init__ part, when do I need one? I
notice that most of the modules that I include contain
one. Also the example that I am trying to use to make
my callback (for a Pmw.Entrybox) includes one. Can
someone point me to some clear definition of what it is
and when I need it. I apologize for being dense, but I
can't seem to get past this.

Thanks,
--vicki