team12.py

####
# Each team's file must define four tokens:
#     team_name: a string
#     strategy_name: a string
#     strategy_description: a string
#     move: A function that returns 'c' or 'b'
####

team_name = 'Team_12!'
strategy_name = 'Betray based on last 10 rounds'
strategy_description = 'betray 25% unless colluded within last 10 rounds.'
''
import random
    
def move(my_history, their_history, my_score, their_score):
  '''Make my move based on the history with this player.
  
  history: a string with one letter (c or b) per round that has been played with this opponent.
  their_history: a string of the same length as history, possibly empty. 
  The first round between these two players is my_history[0] and their_history[0]
  The most recent round is my_history[-1] and their_history[-1]
  
  Returns 'c' or 'b' for collude or betray.
  '''
  if 'c' in their_history[-10:]: # If the other player has colluded within the last 10 rounds.
    return 'b'    # betray.
  else:
    if random.random()<0.25: # 25% of the other rounds
      return 'b'         # betray
    else:
      return 'c'         # but 75% of the time collude