[Python-Dev] Decorator PEP elaborations
Guido van Rossum
gvanrossum at gmail.com
Tue Sep 14 02:12:55 CEST 2004
No PEP text from me, but:
> If one of the authors gets a chance, it would be nice to document the
> rationale for the order of application being inside-out instead of
> top-down:
>
> @deco3
> @deco2
> @deco1
> def myfunc(args):
> . . .
This is the usual order for function-application. @f @g def foo() ->
foo=f(g(foo).
> Also, it would be nice to document the reasons for the approach to
> argument handling:
>
> @deco # calls deco(f)
> @decomaker(arg) # calls tmp(f) where tmp=decomaker(arg)
The thing after the @ can be consered to be an expression (never mind
that syntactically you are restricted), and whatever that expression
returns is called.
--
--Guido van Rossum (home page: http://www.python.org/~guido/)
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