[Python-Dev] A decorator syntax not yet mentioned (I think!)

John Marshall John.Marshall at ec.gc.ca
Wed Aug 11 17:16:57 CEST 2004


How about the following, which I am almost positive
has not been suggested:
-----
class Klass:
    def __init__(self, name):
        self.name = name

    deco meth0:
        staticmethod
    def meth0(x):
        return x
    
    deco meth1:
        classmethod
    def meth1(cls):
        return cls

    deco sayhello:
        funcattrs(name='GvR', language='python')
        log(file='func.log')
    def sayhello(self):
        print 'hello python world'

-----
1) The decorators clearly apply to a specific method/function,
   therefore there is no need to do any stack pushing in memory
   until the method/function definition is done.
2) The decorators are "outside" of the method/function they
   decorate:
   a) which will please those who want the outside location
   b) will not be folded within the function
   c) folding on the decorators can be done so that the
      def is not obfuscated
   d) can be located anywhere in the code--but most likely
      before the "def ...()"
3) The sequence in which the decorators are applied is just
   like code would be--this is certainly intuitive given
   that we are writing code.

This approach could also be applied to classes in case
decorators should ever be extended to them:
-----
deco Klass:
    doc("This is a class to ...")
class Klass:
    :
    :
-----

Any comments?

John



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