Tkinter测验应用messagebox分数始终为0的问题排查求助

错误原因 #

• score变量未实时更新：原代码中score = len(user_ans)*10在play函数初始化时就执行，此时user_ans是空列表，score被固定为0，后续用户答对题目更新user_ans后，score不会自动重新计算。
• 题目索引匹配逻辑不可靠：通过qsn["text"] == ques[i]查找当前题目索引，效率低且易出错——比如初始化时qsn文本为空，会导致匹配失败，无法正确判断答案。
• 随机出题存在重复：使用random.randint(0,2)会导致题目重复出现，无法保证3道题各展示一次。

修复后的代码 #

import tkinter as tk
from tkinter import messagebox
import random

def play():
    wind2 = tk.Toplevel()
    v = tk.IntVar()
    ques = ["Identify the least stable ion amongst the following.",
            "The set representing the correct order of first ionisation potential is",
            "The correct order of radii is"]
    o1 = ["", "Li⁺", "Be⁻", "B⁻", "C⁻"]
    o2 = ["", "K > Na > Li", "Be > Mg >Ca", "B >C > N", "Ge > Si >C"]
    o3 = ["", "N < Be < B", "F⁻ < O²⁻ < N³⁻", "Na < Li < K", "Fe³⁺ < Fe⁴⁺ < Fe²⁺"]
    choice = [o1, o2, o3]
    ans = [2, 2, 2]
    user_ans = []
    current_q_idx = 0
    # 生成随机不重复的题目顺序
    q_order = random.sample(range(len(ques)), len(ques))

    def selection():
        selected = v.get()
        # 直接用当前题目索引判断答案
        if ans[q_order[current_q_idx]] == selected:
            print("Correct Answer")
            user_ans.append((q_order[current_q_idx], selected))

    def nxt():
        nonlocal current_q_idx
        # 第一次点击Go时销毁输入组件
        if nxt.count == 0:
            name.destroy()
            nmbox.destroy()
            nmbut.destroy()
        
        # 判断是否完成所有题目
        if current_q_idx >= len(q_order):
            # 实时计算分数
            score = len(user_ans)*10
            messagebox.showinfo("score", str(score))
            wind2.destroy()
            return
        
        # 更新当前题目内容
        q_idx = q_order[current_q_idx]
        qsn['text'] = ques[q_idx]
        qsn.pack()
        r1['text'] = choice[q_idx][1]
        r2['text'] = choice[q_idx][2]
        r3['text'] = choice[q_idx][3]
        r4['text'] = choice[q_idx][4]
        r1.pack()
        r2.pack()
        r3.pack()
        r4.pack()
        nbut.pack()
        
        current_q_idx += 1
        nxt.count += 1
    nxt.count = 0

    name = tk.Label(wind2, text = "Enter your name below:")
    nmbox = tk.Entry(wind2, bd = 4)
    nmbut = tk.Button(wind2, text = "Go", command = nxt)
    name.pack()
    nmbox.pack()
    nmbut.pack()
    
    qsn = tk.Label(wind2)
    r1 = tk.Radiobutton(wind2, variable = v, value = 1, command=selection)
    r2 = tk.Radiobutton(wind2, variable = v, value = 2, command=selection)
    r3 = tk.Radiobutton(wind2, variable = v, value = 3, command=selection)
    r4 = tk.Radiobutton(wind2, variable = v, value = 4, command=selection)
    nbut = tk.Button(wind2, text = "next", command = nxt)

关键修改点 #

1. 实时计算分数：在弹出分数时直接计算len(user_ans)*10，避免score变量提前固定为0。
2. 记录当前题目索引：新增current_q_idx和q_order（随机不重复的题目顺序），直接通过索引匹配题目和答案，避免文本匹配的错误。
3. 修复出题逻辑：使用random.sample生成不重复的题目顺序，确保所有题目各展示一次。
4. 优化nxt函数逻辑：区分第一次点击Go和后续点击next的操作，完成所有题目后弹出分数并关闭窗口。

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