On Mon, 19 Nov 2007 20:59:51 -0800, [EMAIL PROTECTED] wrote:
> How do I add a decorator to a class method? Here's what I want to do,
> but I guess my syntax isn't right. Any advice?
>
> class A:
> def pre(self,fn):
> def new_func(*args,**kwargs):
> print 'hi'
> fn(*args,**kwargs)
> return new_func
> @self.pre
At this point there is no `self` which is exactly what the exception says
if you run this. This method definition executed at class definition time
so there is no instance of `A`. You can't change it to [EMAIL PROTECTED] either
because the class is not fully constructed yet so the class name `A` does
not exist yet. So you have to move `pre()` out of the class.
def pre(fn):
def new_func(*args, **kwargs):
print "'hi'"
fn(*args, **kwargs)
return new_func
class A(object):
@pre
def func(self, a, b):
print a + b
a = A()
a.func(3, 5)
Ciao,
Marc 'BlackJack' Rintsch
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