[Python-Dev] Pep 318 - new syntax for wrappers (original) (raw)

Skip Montanaro skip at pobox.com
Wed Mar 3 10:38:30 EST 2004 

Jim> (1)  Eventually, there will be another good idea.

Jim> Therefore, we should define a general extension syntax, rather than
Jim> a special case for this particular extension.

Jim>     def func(args) [wrapper1, wrapper2]:

Jim> uses up the syntax forever.

Jim>     def func(args) mods [wrapper1, wrapper2]:

Jim> allows later extensions like

Jim>     def func(args) alias [wrapper1, wrapper2]:
Jim>     def func(args) compiler_hints [wrapper1, wrapper2]:
Jim>     def func(args) my_domain_special_use [wrapper1, wrapper2]:

I don't think the second version is needed. Consider the compiler_hints extension:

def func (args) [hint1, hint2]:
    pass

def hint1(func):
    func.hint1 = True
    return func

def hint2(func):
    mess_with_func.func_code()
    return func

There's no requirement that the decorations have to return a different function. They can return the same function and just operate through side effects on the input function.

Skip

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