Untitled

# see also https://gist.github.com/1093323
class Foo(object):
    baz = 15
    def deco(f):
        '''an in-class decorator method'''
        def fun(self, *args, **kwargs):
            '''use python generic reference to arguments and implicit self'''
            print "before. baz is %s" % self.baz
            try:
                return f(self, *args, **kwargs)
            finally:
                print "after. baz is %s" % self.baz
        return fun
    @deco
    def bar(self):
        print "in bar, mutating baz"
        self.baz = self.baz * 2

Foo().bar()