redefinition of unused function

[bb8]

EDIT: don't read on. i forgot self.

since i needed a member function, i found this on the internet:

def method_dispatch(func):
    dispatcher = singledispatch(func)

    def wrapper(*args, **kwargs):
        return dispatcher.dispatch(args[1].__class__)(*args, **kwargs)

    wrapper.register = dispatcher.register
    update_wrapper(wrapper, func)
    return wrapper

then:

@method_dispatch
    def do_work(self, info):
        pass

    @call.register(type1)
    def _(self, param):
        return do_work(param)

    @call.register(str)
    def _(self, param):
        # do work

as you can see i'm calling an overload from another one, but i get "undefined variable" on that call. how should i call it?