[Python-Dev] Class decorators (original) (raw)

Guido van Rossum guido at python.org
Tue Mar 28 21:04:54 CEST 2006

On 3/28/06, Phillip J. Eby <pje at telecommunity.com> wrote:

At 10:01 AM 3/28/2006 -0800, Guido van Rossum wrote: >OK, I'm convinced (mostly by the awful hackery that Phillip so proudly >exposed :-).

Just as a historical note, here's where you previously rejected the same hackery as an argument for supporting class decorators: http://mail.python.org/pipermail/python-dev/2004-March/043462.html Ironically, the subsequent discussion following the above message brought me around to your point of view. :) Or more precisely, the subsequent discussion and examples convinced me that putting class decorators on top of the class was bad for readability, vs. putting them in the body just after the docstring. As you said, "the use cases are certainly very different than those for function/method decorators". So at this point I'd rather see a way to make my hackery go away (or become part of the standard library in some fashion) rather than simply mimic @decorators for classes.

That's fine. But there's also the C#/Java POV. I'm somehow concerned that any mechanism that puts the syntax inside the class body is somehow going to have a hackish implementation, but I'd be glad to be proven wrong, so please come up with a concrete proposal!

-- --Guido van Rossum (home page: http://www.python.org/~guido/)

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