arvados.events.subscribe(api, [['object_uuid', 'is_a', 'arvados#human']], lambda ev: self.on_event(ev))
time.sleep(1)
self.h = api.humans().create(body={}).execute()
arvados.events.subscribe(api, [['object_uuid', 'is_a', 'arvados#human']], lambda ev: self.on_event(ev))
time.sleep(1)
self.h = api.humans().create(body={}).execute()