用Python写了一个口算小游戏，但是运行的时候提示缺少必要的库，但是我所有的库都是装了的。不知道是我代码的问题还是模块的问题？

下面是完整代码，我增加了一些中文注释，提高了可读性。

import tkinter as tk

import random

# 定义问题

def generate_question():

operations = ['+', '-', '*', '/']

operation = random.choice(operations)

num1 = random.randint(1, 10)

num2 = random.randint(1, 10)

if operation == '+':

result = num1 + num2

elif operation == '-':

result = num1 - num2

elif operation == '*':

result = num1 * num2

else:

result = num1 / num2

return f"{num1} {operation} {num2} = ?", result

# 显示问题

def show_question():

question, result = generate_question()

question_label.config(text=question)

global correct_answer

correct_answer = result

# 检查答案

def check_answer():

user_answer = int(answer_entry.get())

if user_answer == correct_answer:

result_label.config(text="正确！", fg="green")

else:

result_label.config(text="错误！", fg="red")

# 创建主窗口

root = tk.Tk()

root.title("口算游戏")

# 创建问题标签

question_label = tk.Label(root, text="?")

question_label.pack()

# 创建答案输入框

answer_entry = tk.Entry(root)

answer_entry.pack()

# 创建检查按钮

check_button = tk.Button(root, text="检查", command=check_answer)

check_button.pack()

# 创建结果标签

result_label = tk.Label(root, text="")

result_label.pack()

# 创建显示新问题按钮

new_question_button = tk.Button(root, text="新问题", command=show_question)

new_question_button.pack()

# 显示第一个问题

show_question()

# 运行主循环

root.mainloop()