用Python tkinter库和sqlite3库编写一个学生信息管理系统（其中学生管理系统中含有学生姓名，学号，年龄，QQ号，成绩，专业，班级） 注意:在代码后面添加相应的中文注释

好的，我明白了。以下是代码和注释：

import tkinter as tk
import sqlite3

# 创建GUI窗口
window = tk.Tk()
window.title('学生信息管理系统')
window.geometry('600x400')

# 连接数据库
conn = sqlite3.connect('student.db')
c = conn.cursor()

# 创建学生信息表
c.execute('''CREATE TABLE IF NOT EXISTS students (
                id INTEGER PRIMARY KEY AUTOINCREMENT,
                name TEXT,
                student_id TEXT,
                age INTEGER,
                qq TEXT,
                score INTEGER,
                major TEXT,
                class TEXT
            )''')
conn.commit()

# 添加学生信息函数
def add_student():
    name = name_entry.get()
    student_id = student_id_entry.get()
    age = age_entry.get()
    qq = qq_entry.get()
    score = score_entry.get()
    major = major_entry.get()
    _class = class_entry.get()
    c.execute('INSERT INTO students (name, student_id, age, qq, score, major, class) VALUES (?, ?, ?, ?, ?, ?, ?)',
              (name, student_id, age, qq, score, major, _class))
    conn.commit()
    refresh_students()

# 刷新学生信息函数
def refresh_students():
    students_list.delete(0, tk.END)
    for row in c.execute('SELECT * FROM students'):
        students_list.insert(tk.END, row)

# 创建添加学生信息界面
add_frame = tk.Frame(window)
add_frame.pack(side=tk.LEFT, padx=50)

name_label = tk.Label(add_frame, text='姓名：')
name_label.pack()
name_entry = tk.Entry(add_frame)
name_entry.pack()

student_id_label = tk.Label(add_frame, text='学号：')
student_id_label.pack()
student_id_entry = tk.Entry(add_frame)
student_id_entry.pack()

age_label = tk.Label(add_frame, text='年龄：')
age_label.pack()
age_entry = tk.Entry(add_frame)
age_entry.pack()

qq_label = tk.Label(add_frame, text='QQ号：')
qq_label.pack()
qq_entry = tk.Entry(add_frame)
qq_entry.pack()

score_label = tk.Label(add_frame, text='成绩：')
score_label.pack()
score_entry = tk.Entry(add_frame)
score_entry.pack()

major_label = tk.Label(add_frame, text='专业：')
major_label.pack()
major_entry = tk.Entry(add_frame)
major_entry.pack()

class_label = tk.Label(add_frame, text='班级：')
class_label.pack()
class_entry = tk.Entry(add_frame)
class_entry.pack()

add_button = tk.Button(add_frame, text='添加', command=add_student)
add_button.pack()

# 创建展示学生信息界面
show_frame = tk.Frame(window)
show_frame.pack(side=tk.LEFT, padx=50)

students_list = tk.Listbox(show_frame)
students_list.pack()

refresh_button = tk.Button(show_frame, text='刷新', command=refresh_students)
refresh_button.pack()

# 执行主循环
window.mainloop()

# 关闭数据库连接
conn.close()

中文注释已添加在代码中，希望能够帮到您！