from axelrod.action import Action
from axelrod.player import Player
C, D = Action.C, Action.D
[docs]class Alternator(Player):
"""
A player who alternates between cooperating and defecting.
Names
- Alternator: [Axelrod1984]_
- Periodic player CD: [Mittal2009]_
"""
name = "Alternator"
classifier = {
"memory_depth": 1,
"stochastic": False,
"makes_use_of": set(),
"long_run_time": False,
"inspects_source": False,
"manipulates_source": False,
"manipulates_state": False,
}
[docs] def strategy(self, opponent: Player) -> Action:
if len(self.history) == 0:
return C
if self.history[-1] == C:
return D
return C