tkinter python到mysql数据库中%d格式不是字符串错误

import tkinter as tk
import mysql.connector

def insert_data():
    # 获取用户输入的整数
    num = int(entry.get())
    
    # 将整数转换为字符串
    num_str = str(num)
    
    # 连接MySQL数据库
    conn = mysql.connector.connect(
        host="localhost",
        user="username",
        password="password",
        database="database_name"
    )
    
    # 创建游标对象
    cursor = conn.cursor()
    
    # 执行插入数据的SQL语句
    sql = "INSERT INTO table_name (column_name) VALUES (%s)"
    cursor.execute(sql, (num_str,))
    
    # 提交事务
    conn.commit()
    
    # 关闭游标和数据库连接
    cursor.close()
    conn.close()

# 创建窗口
window = tk.Tk()

# 创建标签和输入框
label = tk.Label(window, text="请输入一个整数：")
label.pack()
entry = tk.Entry(window)
entry.pack()

# 创建按钮
button = tk.Button(window, text="插入数据", command=insert_data)
button.pack()

# 运行窗口主循环
window.mainloop()