class MethodDesc(object):
    #XXX: testing only
    def __init__(self, *args):
        self.args = args

    def __repr__(self):
        return 'MethodDesc(%r)' % (self.args,)

class Base(object):
	_methods = {}
	@classmethod
	def described(cls, retval=None):
		def decorator(func):
			print func.__name__
			print type(func)
			code = func.func_code
			args = zip(code.co_varnames[:code.co_argcount], func.func_defaults)
			cls._methods[func.__name__] = MethodDesc(args, retval)
			return func
		return decorator
described = Base.described

class Foo(Base):
    @described(retval=5)
    def foo(self, woof='foo'):
        return 1

print Foo._methods