python - 石头、剪刀、布 - Python

Question

我正在尝试完成类里面的石头、剪刀、布作业。

我收到“UnboundLocalError:赋值前引用的局部变量“绑定(bind)”” 错误。

有人可以告诉我为什么会收到此错误吗？

import random

user_score = 0
computer_score = 0
tied = 0

def main():
print ("Let's play the game of Rock, Paper, Scissors. ")

while True:
    print ("Your current record is", user_score, "wins,", computer_score,     "losses and", tied, "ties")

    computer_choice = random.randint(1,3)
    if computer_choice == 1:
        computer_rock()
    elif computer_choice == 2:
        computer_paper()
    else:
        computer_scissors()    

def computer_rock():
     user_choice = input("1 for Rock, 2 for Paper, 3 for Scissors: ")
     if user_choice == "1":
        print ("Draw! You both chose Rock.")
        tied += 1            
        try_again()
     elif user_choice == "2":
        print ("You Win! The computer chose Rock, while you picked Paper.")
        user_score += 1            
        try_again()
    elif user_choice == "3":
        print ("You Lose! You chose scissors, while the computer picked Rock.")
        computer_score += 1            
        try_again()
else:
    print ("ERROR: Invalid entry, please re-enter your choice. ")
    computer_rock()

def computer_paper():
    user_choice = input("1 for Rock, 2 for Paper, 3 for Scissors: ")
    if user_choice == "1":
        print ("You Lose! You chose rock, while the computer picked Paper.")
        computer_score += 1        
        try_again()
    elif user_choice == "2":
        print ("Draw! You both picked Paper.")
        tied += 1            
        try_again()
    elif user_choice == "3":
        print ("You Win! The computer chose Paper, while you picked Scissors.")
        user_score += 1                    
        try_again()
    else:
        print ("ERROR: Invalid entry, please re-enter your choice. ")
        computer_paper()

def computer_scissors():
    user_choice = input("1 for Rock, 2 for Paper, 3 for Scissors: ")
    if user_choice == "1":
        print ("You Win! You chose rock, while the computer picked Scissors.")
        user_score += 1  
        try_again()                  
    elif user_choice == "2":
        print ("You Lose! The computer chose Scissors, while you picked Paper.")
        computer_score += 1                    
        try_again()
    elif user_choice == "3":
        print ("Draw! You both picked Scissors.")
        tied += 1            
        try_again()
    else:
        print ("ERROR: Invalid entry, please re-enter your choice. ")
        computer_scissors()

def try_again():
    choice = input("Play again? Yes or no. ")
    if choice == "y" or choice == "Y" or choice == "yes" or choice == "Yes":
        main()
    elif choice == "n" or choice == "N" or choice == "no" or choice == "No":
        print ("Thanks for playing. ") 
    else:
        print ("Try again")
        try_again()

main()

Answer 1

将以下代码添加为三个 computer_() 函数中每个函数的第一行应该可以解决您的问题。

global tied, user_score, computer_score

有更好的方法来完成您正在做的事情，但这应该可以帮助您克服困难:)