Nice find, thanks. I guess I won't feel so bad about requiring a specific order when defining static methods for "CLR export".
On Feb 6, 2008 3:46 PM, Michael Foord <[EMAIL PROTECTED]> wrote: > From http://www.ddj.com/web-development/184406073 > > Usually, most decorators expect a function on input, and return either a > function or an attribute descriptor as their output. The Python > built-ins classmethod, staticmethod, and property all return attribute > descriptors, so their output cannot be passed to a decorator that > expects a function. That's why I had to put classmethod first in Listing > Four. As an experiment, try reversing the order of @traced and > @classmethod in Listing Four, and see if you can guess what will happen. > > > Curt Hagenlocher wrote: > > This is really more of a Python question than an IronPython question, > > but I'm not currently on any non-Iron Python lists. :) > > > > The following definition results in an error under both CPython 2.5 > > and IronPython. Decorating a method as static or class prevents > > attributes being set on the resulting definition. > > > > def decorate(obj): > > obj.decorated = True > > return obj > > > > class X: > > @decorate > > @staticmethod > > def foo(): > > pass > > > > Does anyone know the "why" of this behavior? > > > > I can work around this problem by declaring the decorators in the > > opposite order, but it seems like an odd imposition to put on the > > consumers of the code in question. I'm worried that I'm missing > > something about the expected semantics of these standard functions. > > > > -- > > Curt Hagenlocher > > [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > Users mailing list > > Users@lists.ironpython.com > > http://lists.ironpython.com/listinfo.cgi/users-ironpython.com > > > > _______________________________________________ > Users mailing list > Users@lists.ironpython.com > http://lists.ironpython.com/listinfo.cgi/users-ironpython.com >
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