[Python-Dev] PEP 443 Accepted
lukasz at langa.pl
Wed Jun 5 09:56:08 CEST 2013
On 5 cze 2013, at 09:29, Markus Unterwaditzer <markus at unterwaditzer.net> wrote:
> As somebody who missed the discussion about it and right now took a quick look at the PEP, i ask myself how subclasses are handled, as i don't see anything about it in the PEP, just support for ABCs.
> E.g if
> issubclass(Apple, Fruit)
> And i call a function which has registered an implementation for the Fruits type with an object of type Apple, is this implementation used? I assume so, but as said, i don't see it mentioned anywhere.
Yes, this is the supported behaviour. The PEP briefly explains that "Where there is no registered implementation for a specific type, its method resolution order is used to find a more generic implementation."
As Nick noted, the reason the description is so brief is that this works just like calling methods.
IRC: ambv on #python-dev
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