Overriding functionality

Alex Arnon <>
Sun Aug 21 14:39:24 CEST 2005

On 8/20/05,  <> wrote:
> I had a situation in a python project where for 99% of the uses of this
> class, the programmed behavior was perfect.  But for a few situations
> one of the member functions of that classes needed to use an alternate
> object.  On top of that, we didn't even know it needed that until we
> came across it with one of our clients broken interfaces.  To solve the
> problem all I had to do was subclass the object and override that
> function.  Is there any common erlang idiom for this? This being,
> basically, inheritance I guess.  I'm not looking for an OO model
> really, I don't think, but sometimes it does seem easier to simply
> override functionality.  How is this situation even dealt with in a
> language like erlang?
> Thank you

(Note that I speak as a newbie, so take this with a pich of salt :) )
The simplest answer is "it depends on what type of component you are
working on" but generally, Erlang/OTP encourages the use of symbolic
indirection and behaviours to obtain any type of entity behavioural
inheritance. I think you can use import+export module attributes in
order to more easily simulate behaviour inheritance (is this

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