[Python-Dev] Issue 643841: Including a new-style proxy base class in 2.6/3.0 (original) (raw)

Fred Drake fdrake at acm.org
Wed May 21 13:36:19 CEST 2008

On May 21, 2008, at 5:41 AM, Nick Coghlan wrote:

While a proxy class written in C would no doubt be faster than one written in Python, one of the things I'm hoping to achieve is for the stdlib generic proxy to serve as an example for people writing their own new-style proxy classes in addition to being usable as a base class (Adam Olsen suggested ProxyMixin instead of ProxyBase as a possible name).

The idea that it would serve as an example seems odd; the reason to
make things part of the standard library is because their
implementation needs to track the Python core closely. For a proxy,
it would be the need to reflect additional slot methods as they're
added. A Python implementation may be able to do this just fine, but
the performance penalty would make it uninteresting for many large
applications.

For what it's worth, zope.proxy does support subclassing.

-Fred

-- Fred Drake

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