Python程序接收非整数输入不崩溃 调用repeatr()重输实现方法

问题原因 #

你当前代码崩溃的核心原因有3个：

• 直接对input()的返回值做int()强转，用户输入非整数内容时会触发ValueError导致程序直接终止
• 退出指令q的判断放在int强转逻辑之后，永远无法匹配到字符串类型的输入，退出功能实际失效
• 输入合法性判断逻辑错误：用user_input != options对比单个输入值和整个选项列表，判断结果恒为真，会出现合法输入被误判的问题

修复方案 #

所有接收用户输入的位置统一做三层校验：

1. 先判断输入是否为退出指令q/Q，匹配则直接执行退出逻辑
2. 用try-except捕获整数转换异常，非整数输入直接调用repeatr()提示重输
3. 转换为整数后校验是否在允许的选项范围内，不在范围内同样触发重输

修复后的完整可运行代码如下：

import random

user_wins = 0
user_draws = 0
user_losses = 0
rounds = 0

def closr():
    quit()

def repeatr():
    print("That is not a valid input. Please input a correct value.")

def promptr():
    print("Please select an input from the following options.")

options = [5, 4, 3, 2, 1]
# 原range(1,5)仅包含1-4，调整为range(1,6)覆盖1-5的完整选项
randomlist = random.sample(range(1, 6), 3)
randomr = randomlist

# 初始菜单输入循环
while True:
    user_input_raw = input("Type 5/4/3/2/1 or Q to quit.").strip().lower()
    if user_input_raw == "q":
        closr()
    try:
        user_input = int(user_input_raw)
    except ValueError:
        repeatr()
        continue
    if user_input in options:
        break
    repeatr()

# 对局循环
while rounds < 10:
    promptr()
    print(f"Current optional choices: {randomlist}")
    player_choice_raw = input().strip().lower()
    if player_choice_raw == "q":
        closr()
    try:
        player_choice = int(player_choice_raw)
    except ValueError:
        repeatr()
        continue
    if player_choice not in randomr:
        repeatr()
        continue
    
    npc = random.randint(1,5)
    print("Your opponent has drawn: ", npc)
        
    if npc > player_choice:
        print("You have been defeated this round.")
        user_losses = user_losses + 1
        print("The score is:" , user_wins , ":" , user_losses)
        rounds = rounds + 1
    elif npc < player_choice:
        print ("You have won this round.")
        user_wins = user_wins + 1
        print ("The score is:" , user_wins , ":" , user_losses)
        rounds = rounds + 1
    elif npc == player_choice:
        print ("You have drawn this round.")
        user_draws = user_draws + 1
        print ("The score is:" , user_wins , ":" , user_losses)
        rounds = rounds + 1

if user_losses < user_wins:
        print("You have won the game!")
elif user_losses > user_wins:
        print("You have lost this game. Better luck next time!")
elif user_losses == user_wins:
        print("The game has ended in a draw.")

print("the number of wins you had was:" , user_wins)
print("the number of draws you had was:" , user_draws)
print("the number of losses you had was:" , user_losses)
print("The final score was (Player vs CPU):" , user_wins, ":" , user_losses)

# 结束退出循环
while True:
    resu=input("Press Q to quit the game.").strip().lower()
    if resu=="q":
        closr()

额外调整说明 #

• 去掉了原代码中无意义的x/y/u循环标记变量，直接用while True+break实现循环控制，逻辑更清晰
• 给对局阶段的输入加了可选选项提示，避免用户不知道可输入的值范围
• 所有输入统一做了首尾去空格、小写转换，避免用户误输空格、大写Q导致判断失效
• 修正了原random.sample的取值范围，现在会从1-5的完整选项中抽取3个可选值，和初始菜单的选项范围一致

内容的提问来源于stack exchange，提问作者SuspiciouslyQuiet