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

    global _event_space
    event_space = next(_event_space)
    @_ensure_seeders_list
    def p(seeders, delegator_factory, *args, **kwargs):
        return fn((seeders + [per_event_source_id(event_space)]), delegator_factory, event_space=event_space, *args, **kwargs)
    return p

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

def pave_event_space(fn=pair):