So ya it's an python ddos script you just need ip and thats it localhost is there so you can try yourself too
-- Please be advised that the usage of this network or any associated actions should only be undertaken with the explicit permission of the network owner or authorized personnel.
-- Any unauthorized or improper use may lead to legal consequences.
-- I disclaim any responsibility for any damages or actions resulting from unauthorized usage.
-- I strongly urge you to employ this network responsibly and ethically.