team0.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 = 'Anir and Arman' # Only 10 chars displayed.
strategy_name = 'Easy Wins'
strategy_description = 'How does this strategy decide?'
    
def move(my_history, their_history, my_score, their_score):
    ''' Arguments accepted: my_history, their_history are strings.
    my_score, their_score are ints.
    
    Make my move.
    Returns 'c' or 'b'. 
    '''
    if len(my_history)==0: # It's the first round; collude.
        return 'c'
    elif their_history.count('b') >= their_history.count('c'):
        return 'b'   
    else:
        return 'c' # otherwise collude. #
        
    # Betrays on the first move and betrays if the number of betrays of the opponent is greater than or equal to the number of times she has colluds. Else she cooperates
    
    # my_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].
    
    # Analyze my_history and their_history and/or my_score and their_score.
    # Decide whether to return 'c' or 'b'.
    
    
def test_move(my_history, their_history, my_score, their_score, result):
    '''calls move(my_history, their_history, my_score, their_score)
    from this module. Prints error if return value != result.
    Returns True or False, dpending on whether result was as expected.
    '''
    real_result = move(my_history, their_history, my_score, their_score)
    if real_result == result:
        return True
    else:
        print("move(" +
            ", ".join(["'"+my_history+"'", "'"+their_history+"'",
                       str(my_score), str(their_score)])+
            ") returned " + "'" + real_result + "'" +
            " and should have returned '" + result + "'")
        return False

if __name__ == '__main__':
     
    # Test 1: Betray on first move.
    if test_move(my_history='',
              their_history='', 
              my_score=0,
              their_score=0,
              result='b'):
         print 'Test passed'
     # Test 2: Continue betraying if they collude despite being betrayed.
    test_move(my_history='bbb',
              their_history='ccc', 
              # Note the scores are for testing move().
              # The history and scores don't need to match unless
              # that is relevant to the test of move(). Here,
              # the simulation (if working correctly) would have awarded 
              # 300 to me and -750 to them. This test will pass if and only if
              # move('bbb', 'ccc', 0, 0) returns 'b'.
              my_score=0, 
              their_score=0,
              result='b')