cs61a 2020Fall Hog的问题，求解答

正在做CS61A 2020Fall 的Hog，卡在problem5b了，看了好久也没看出来哪里有问题，希望有做过此题的朋友能帮我看看！
我的代码如下：

def play(strategy0, strategy1, score0=0, score1=0, dice=six_sided,
goal=GOAL_SCORE, say=silence, feral_hogs=True):
‘’‘Simulate a game and return the final scores of both players, with Player
0's score first, and Player 1's score second.

A strategy is a function that takes two total scores as arguments (the
current player's score, and the opponent's score), and returns a number of
dice that the current player will roll this turn.

strategy0:  The strategy function for Player 0, who plays first.
strategy1:  The strategy function for Player 1, who plays second.
score0:     Starting score for Player 0
score1:     Starting score for Player 1
dice:       A function of zero arguments that simulates a dice roll.
goal:       The game ends and someone wins when this score is reached.
say:        The commentary function to call at the end of the first turn.
feral_hogs: A boolean indicating whether the feral hogs rule should be active.
’‘’
who = 0  # Who is about to take a turn, 0 (first) or 1 (second)
# BEGIN PROBLEM 5
"*** YOUR CODE HERE ***"

score0_pre = score1_pre = 0
while score0 < goal and score1 < goal:
    
    if who:
        roll_num = strategy1(score1,score0)
        bonus = 3 if abs(roll_num - score1_pre) == 2 else 0
        score1_pre += take_turn(roll_num,score0,dice)
        score1 += score1_pre + bonus
        if is_swap(score1,score0):
            score0,score1 = score1,score0
        who = other(who)

    else:
        roll_num = strategy0(score0,score1)
        bonus = 3 if abs(roll_num - score0_pre) == 2 else 0
        score0_pre = take_turn(roll_num,score1,dice) 
        score0 += score0_pre + bonus
        if is_swap(score0,score1):
            score0,score1 = score1,score0
        who = other(who)

# END PROBLEM 5
# (note that the indentation for the problem 6 prompt (***YOUR CODE HERE***) might be misleading)
# BEGIN PROBLEM 6
"*** YOUR CODE HERE ***"
# END PROBLEM 6
return score0, score1

结果它报错：

我的思路是：1.扔的骰子数赋值给roll_num与score_pre相减得到绝对值，如果等于2则bonus为3，否则为0
2.玩家本轮摇骰子得到的分数记为score_pre（pre后缀主要是因为下一轮要依次判断是否得到bonus），总得分score += score_pre + bonus
3.判断是否要swap两玩家得分
4.由while的条件判断是否有人的分数达到goal，如果有则跳出循环结束游戏。

根据报错结果我分析是，player0总得分为43（大于goal，本应直接结束游戏）以后，player1又进行了一轮，总得分由15变为19。但我明明用while判断了player0的分数大于goal了，为什么还会继续一轮呀？

哈哈 终于发现了

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