[Python-Dev] PEP 246 adapter classes (original) (raw)

[Python-Dev] PEP 246 - concrete assistance to developers of new adapter classes

Nick Coghlan ncoghlan at iinet.net.au
Fri Jan 21 14:02:18 CET 2005

Phillip's monkey-typing PEP (and his goal of making it easy to write well behaved adapters) got me wondering about the benefits of providing an adaptation. Adapter class that could be used to reduce the boiler plate required when developing new adapters. Inheriting from it wouldn't be required in any way - doing so would simply make it easier to write a good adapter by eliminating or simplifying some of the required code. Being written in Python, it could also serve as good documentation of recommended adapter behaviour.

For instance, it could by default preserve a reference to the original object and use that for any further adaptation requests:

class Adapter(object): def init(self, original): self.original = original

def conform(self, protocol): return adapt(self.original, protocol)

Does anyone else (particularly those with PEAK and Zope interface experience) think such a class would be beneficial in encouraging good practices?

Regards, Nick.

-- Nick Coghlan | ncoghlan at email.com | Brisbane, Australia

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