Using metaclasses to play with decorators.

David MacQuigg dmq at gain.com
Wed Jun 23 02:19:32 CEST 2004


On Sun, 20 Jun 2004 14:48:23 -0400, "Colin J. Williams"
<cjw at sympatico.ca> wrote:

>I have yet to wrap my mind around decorators.

Decorators are very simple.  They are just a way to provide different
forms of methods, without introducing a new keyword, or some other
more awkward syntax.

Say you wanted to define a method that didn't have 'self' as its first
argument.  You could add a new keyword to the language:

noself methodA(x,y):
	return x + y

Or you could add a "decorator" to the existing syntax:

def methodA(x,y) [noself]:
	return x + y

Change 'noself' to 'staticmethod' and you have one of the current
proposals in PEP318.

Don't get distracted by 'staticmethod' and other mumbo-jumbo
terminology, and you should have no problem with decorators.

-- Dave




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