Python 3数学游戏变量未更新问题求助

核心问题：变量作用域错误 #

你在difficultysystem函数内给num1、num2赋值时，Python会将它们视为函数局部变量，不会修改game函数或全局作用域的同名变量，导致外部始终使用初始值。

其他待修复的问题 #

• 整数与字符串直接拼接会报错，需先将整数转为字符串
• 用户输入的答案是字符串类型，需转为整数才能和计算结果比较
• points + 1仅做运算未赋值，无法实现加分效果
• 递归调用难度选择函数时，未处理返回值，可能导致变量未正确初始化
• 全局变量num1、num2属于冗余定义，应放在函数内部管理

修复后的完整代码 #

import random

Positive = ["Yes", "yes", "y", "Y"]
points = 0

def game():
    print("Cool, let's start:")
    print("Please enter your name: ")
    name = input()
    print(" ")
    print(f"Nice to meet you {name}")
    print("This game is about math questions. You will get a random question and then will need to proceed to the next one for a total of 5 times. Are you ready?")
    Begin = input()
    print(" ")
    
    if Begin in Positive:
        def difficultysystem():
            print("Please select your difficulty: hard, medium, or easy.")
            print("*Note* Please keep in mind you should not use any caps")
            Difficulty = input()
            if Difficulty == "easy":
                return random.randint(1,10), random.randint(1,10)
            elif Difficulty == "medium":
                return random.randint(10,50), random.randint(10,50)
            elif Difficulty == "hard":
                return random.randint(50,100), random.randint(50,100)
            else:
                print(f"Hey {name} seems like we could not find your difficulty, please make sure you wrote it down correctly")
                print(" ")
                # 递归调用后返回正确的数值
                return difficultysystem()

        # 通过返回值获取难度对应的num1和num2
        num1, num2 = difficultysystem()

        print("Nice, time to start:")
        print(f"How much is {num1} * {num2}?")
        # 将输入转为整数
        Answer1 = int(input())
        print(" ")
        
        if num1 * num2 == Answer1:
            print("Good job!")
            global points
            points += 1
        else:
            print(f"Not quite, the correct answer was {num1 * num2}")
    else:
        print("Oki doke, bye")

# First start input
Start = input("Are you ready to play? ")
if Start in Positive:
    game()

关键修改说明 #

1. 作用域修复：让difficultysystem函数返回生成的num1和num2，在game函数中接收返回值，彻底解决作用域问题
2. 字符串拼接优化：使用f-string简化字符串拼接，同时自动处理整数转字符串
3. 输入类型转换：将用户输入的答案转为整数int(input())，才能和计算结果正确比较
4. 加分逻辑修复：用points += 1替代points + 1，实现分数累加；如果要全局保留分数，需用global声明
5. 递归逻辑优化：递归调用difficultysystem时返回结果，确保最终能拿到有效的数值
6. 冗余代码清理：删除不必要的全局变量num1、num2，以及未使用的matplotlib导入、StartupGame等变量

内容的提问来源于stack exchange，提问作者LPandJL