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

    lookup = registry.lookup1
    def _hook(iface, ob):
        factory = lookup(declarations.providedBy(ob), iface)
        if (factory is None):
            return None
        else:
            return factory(ob)
    interface.adapter_hooks.append(_hook)
    return _hook

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

def _addHook(registry):