On Nov 20, 2:05 am, Marc 'BlackJack' Rintsch <[EMAIL PROTECTED]> wrote: > 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
Thanks those answers make sense. But for this function if defined outside the class: > def pre(fn): > def new_func(*args, **kwargs): > print "'hi'" > fn(*args, **kwargs) > return new_func Can new_func reference self? Would self just be one of the args? -Greg -- http://mail.python.org/mailman/listinfo/python-list
