如何确保Tkinter表单中的值被输入到MySQL表中，而不是收到错误消息？

import tkinter as tk
import mysql.connector

def submit_form():
    # 获取用户输入的值
    name = name_entry.get()
    age = age_entry.get()

    # 数据验证
    if not name or not age:
        error_label.config(text="请输入姓名和年龄")
        return

    # 连接MySQL数据库
    try:
        conn = mysql.connector.connect(
            host="localhost",
            user="your_username",
            password="your_password",
            database="your_database"
        )
        cursor = conn.cursor()

        # 插入数据到MySQL表中
        sql = "INSERT INTO your_table (name, age) VALUES (%s, %s)"
        values = (name, age)
        cursor.execute(sql, values)
        conn.commit()

        # 关闭数据库连接
        cursor.close()
        conn.close()

        # 清空表单
        name_entry.delete(0, tk.END)
        age_entry.delete(0, tk.END)

        # 显示成功消息
        error_label.config(text="数据插入成功")

    except mysql.connector.Error as e:
        # 处理数据库操作异常
        error_label.config(text="数据库操作错误：" + str(e))

# 创建表单界面
root = tk.Tk()

name_label = tk.Label(root, text="姓名")
name_label.pack()
name_entry = tk.Entry(root)
name_entry.pack()

age_label = tk.Label(root, text="年龄")
age_label.pack()
age_entry = tk.Entry(root)
age_entry.pack()

submit_button = tk.Button(root, text="提交", command=submit_form)
submit_button.pack()

error_label = tk.Label(root, text="")
error_label.pack()

root.mainloop()