Source code for axelrod.strategies.better_and_better
from axelrod.action import Action
from axelrod.player import Player
C, D = Action.C, Action.D
[docs]
class BetterAndBetter(Player):
"""
Defects with probability of '(1000 - current turn) / 1000'.
Therefore it is less and less likely to defect as the round goes on.
Names:
- Better and Better: [Prison1998]_
"""
name = "Better and Better"
classifier = {
"memory_depth": float("inf"),
"stochastic": True,
"long_run_time": False,
"inspects_source": False,
"manipulates_source": False,
"manipulates_state": False,
}
[docs]
def strategy(self, opponent: Player) -> Action:
"""Actual strategy definition that determines player's action."""
current_round = len(self.history) + 1
probability = current_round / 1000
return self._random.random_choice(probability)