Why we will use obj$func() often

[Erik Max Francis]

Mark Hahn wrote:

> "Fredrik Lundh" <fredrik at pythonware.com> wrote ...
> 
> > > (by the way, Python cannot do this)
> >
> > sure can, if you use mutable integers.
> 
> That's interesting.  I've never heard of them.  Can you show me a code
> example?

Make a container.  Put an integer in it.  Pass the container around. 
Change the integer that's contained in it.

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