编程初学者，用while语句就开始逻辑混乱，自己做作业，已经发晕，每次调试都无法改正，求指导


规则是这样的：玩家和电脑，各两颗骰子，如果掷出的两颗骰子没有1，则分数累积，玩家可选择是否继续或结束回合，如果两颗骰子之中有一个1，则所得分数不予累计，强制结束回合，如果掷到两个1，累计的分数全部清零，并且强制结束回合，由电脑继续游戏。如此，直到有一方累计分数达到100或以上的，游戏胜利。题目中给予电脑的条件是只要在一回合中累计得分20点，则结束回合，由玩家继续游戏。

# Start
# Play control:
play = input('Would you like to play PIG (y/n)? ')# Play control
while play == 'y':

    # Welcome:
    username = input('Great! What is your name? ')
    print('Hi',username)

    # Game:
    scoreP = 0# Player's potential score
    scoreC = 0# Computer's potential score
    turn = 0# Turn control(Player: 0, Computer:1)
   


    # Player's turn:
    print('|------------------- Start Player\'s Turn ---------------------')  

        # Roll or hold:
    while turn == 0:
        hold = input('| Would you like to roll or hold (r/h)? ')
        while hold =='r':
            totalP = 0# Player's turn total
            import random
            dicP1 = random.randint(1,6)# Player's dice 1
            dicP2 = random.randint(1,6)# Player's dice 2
            toP = 0# Total of this turn
            # No 1
            if dicP1 and dicP2 != 1:
                stepP = dicP1 + dicP2# Step total
                toP = totalP + stepP
                scoreP = scoreP + toP
                print('| Die 1:',dicP1,'| Die 2:',dicP2,'| Die total:',stepP)
                print('| Turn total:',toP,'| Potential score:',scoreP)
                print('|')
                hold = input('| Would you like to roll or hold (r/h)? ')
            # If end
                   

            # Single 1
            elif dicP1 or dicP2 == 1:
                stepP = dicP1 + dicP2
                print('| Die 1:',dicP1,'| Die 2:',dicP2,'| Die total:',stepP)
                print('|')
                print('| *** You rolled a ONE - Turn over - No points for you!')
                # Turn end show:
                print('| *** Kramer\'s score:',scoreP,'| Computer\'s score:',scoreC)
                print('|------------------- End Player\'s Turn -----------------------')
                print('|------------------- Start Computer\'s Turn -------------------')
                turn = turn + 1
            # Elif end
                   

            # Double 1s
            else:
                stepP = dicP1 + dicP2
                totalP = 0
                print('| Die 1:',dicP1,'| Die 2:',dicP2,'| Die total:',stepP)
                print('|')
                print('| *** Ouch! That hurts! Two ONEs - You lose your entire score!')
                print('| *** Kramer\'s score:',scoreP,'| Computer\'s score:',scoreC)
                print('|------------------- End Player\'s Turn -----------------------')
                print('|------------------- Start Computer\'s Turn -------------------')
                turn = turn + 1
            # Else end
                   

            # While End
        else:
            turn = turn+ 1
            print('| *** Kramer\'s score:',scoreP,'| Computer\'s score:',scoreC)
            print('|------------------- End Player\'s Turn -----------------------')
            print('|------------------- Start Computer\'s Turn -------------------')
        # while end
           

        # Else end
           


    # While end
    # Player's Turn end
       

    # Computer's turn:
    else:
        # Roll or hold:
        totalC = 0
        while totalC < 20:
            import random
            dicC1 = random.randint(1,6)# Computer's dice 1
            dicC2 = random.randint(1,6)# Computer's dice 2
           

            # No 1
            if dicC1 and dicC2 != 1:
                stepC = dicC1 + dicC2# Step total
                toC = stepC + totalC
                scoreC = scoreC + toC
                print('| Die 1:',dicC1,'| Die 2:',dicC2,'| Die total:',stepC)
                print('| Turn total:',toC,'| Potential score:',scoreC)
                print('|')
            # If end

            # Single 1
            elif dicC1 or dicC2 == 1:
                stepC = dicC1 + dicC2
                print('| Die 1:',dicC1,'| Die 2:',dicC2,'| Die total:',stepC)
                print('|')
                print('| *** Computer rolled a ONE - Turn over - No points for computer!')
                # Turn end show:
                print('| *** Kramer\'s score:',scoreP,'| Computer\'s score:',scoreC)
                print('|------------------- End Computer\'s Turn ---------------------')
                turn = turn - 1
            # Elif end
                   

            # Double 1s
            else:
                stepC = dicC1 + dicC2
                totalC = 0
                print('| Die 1:',dicC1,'| Die 2:',dicC2,'| Die total:',stepC)
                print('|')
                print('| *** Ouch! That hurts! Two ONEs - Computer lose entire score!')
                print('| *** Kramer\'s score:',scoreP,'| Computer\'s score:',scoreC)
                print('|------------------- End Computer\'s Turn ---------------------')
                turn = turn - 1
            # Else end
        # While end
           

        else:
            print('| *** Kramer\'s score:',scoreP,'| Computer\'s score:',scoreC)
            print('|------------------- End Computer\'s Turn ---------------------')
            turn = turn - 1

           



    # Else end
    # Computer's turn end
       

    # Replay control:
    play = input('Would you like to play again (y/n)? ')
# While end
#
else:
    print('Thanks for playing')