human
Here's a good function header given the following:
I wrote the below code

    @decorator
    def wrapper(function, *args, **kw):
        if (len(args[position]) == 0):
            return ast.literal_eval(return_code)
        else:
            return function(*args, **kw)
    return wrapper

What's a good function header?
assistant
#Here's a good function header.

@dual_decorator
def empty_arg_shortcircuit(return_code=u'[]', position=1):