开发Python学生成绩管理系统：使用Tkinter和文本文件

import tkinter as tk
from tkinter import messagebox, simpledialog
import csv
import os

# 学生成绩管理系统类
class GradeSystem(tk.Tk):
    def __init__(self):
        super().__init__()
        self.title("学生成绩管理系统")
        self.geometry("500x300")
        self.filename = "grades.csv"
        self.data = []
        self.load_data()
        self.create_widgets()

    def create_widgets(self):
        # 登录按钮
        self.login_button = tk.Button(self, text="登录", command=self.login)
        self.login_button.pack()

        # 显示成绩的列表框
        self.grade_list = tk.Listbox(self)
        self.grade_list.pack(fill=tk.BOTH, expand=True)
        self.update_grade_list()

        # 增删改查按钮
        self.add_button = tk.Button(self, text="添加成绩", command=self.add_grade)
        self.add_button.pack(side=tk.LEFT)
        self.delete_button = tk.Button(self, text="删除成绩", command=self.delete_grade)
        self.delete_button.pack(side=tk.LEFT)
        self.edit_button = tk.Button(self, text="修改成绩", command=self.edit_grade)
        self.edit_button.pack(side=tk.LEFT)
        self.search_button = tk.Button(self, text="查询成绩", command=self.search_grades)
        self.search_button.pack(side=tk.LEFT)

    def login(self):
        # 简单的登录对话框
        username = simpledialog.askstring("登录", "输入用户名:")
        password = simpledialog.askstring("登录", "输入密码:", show='*')
        if username == "admin" and password == "admin":
            messagebox.showinfo("登录", "登录成功")
        else:
            messagebox.showerror("登录", "用户名或密码错误")

    def add_grade(self):
        # 添加成绩
        student = simpledialog.askstring("添加成绩", "输入学生姓名:")
        grade = simpledialog.askstring("添加成绩", "输入学生成绩:")
        if student and grade:
            self.data.append([student, grade])
            self.update_grade_list()
            self.save_data()

    def delete_grade(self):
        # 删除选中的成绩
        selected = self.grade_list.curselection()
        if selected:
            del self.data[selected[0]]
            self.update_grade_list()
            self.save_data()

    def edit_grade(self):
        # 修改选中的成绩
        selected = self.grade_list.curselection()
        if selected:
            student, grade = self.data[selected[0]]
            new_grade = simpledialog.askstring("修改成绩", f"输入{student}的新成绩:")
            if new_grade:
                self.data[selected[0]] = [student, new_grade]
                self.update_grade_list()
                self.save_data()

    def search_grades(self):
        # 查询成绩
        student = simpledialog.askstring("查询成绩", "输入学生姓名:")
        if student:
            found = [f"{s[0]}: {s[1]}" for s in self.data if s[0] == student]
            messagebox.showinfo("查询结果", "\n".join(found) if found else "未找到该学生的成绩")

    def update_grade_list(self):
        # 更新列表框内容
        self.grade_list.delete(0, tk.END)
        for student, grade in self.data:
            self.grade_list.insert(tk.END, f"{student}: {grade}")

    def load_data(self):
        # 从文件加载数据
        if os.path.exists(self.filename):
            with open(self.filename, newline='') as file:
                self.data = list(csv.reader(file))

    def save_data(self):
        # 保存数据到文件
        with open(self.filename, 'w', newline='') as file:
            writer = csv.writer(file)
            writer.writerows(self.data)

if __name__ == "__main__":
    app = GradeSystem()
    app.mainloop()