GUI版的学生成绩管理系统，具有如下功能： 1）学生的信息输入，（学生，包括属性：学号，姓名，C成绩，C++成绩，python成绩） 2）显示输入的学生信息 3）按学生总分对学生降序排序。 4）计算每个学生的总分 用python写出该代码

好的，以下是一个简单的GUI版学生成绩管理系统的Python代码实现：

from tkinter import *
from tkinter import messagebox

class Student:
    def __init__(self, id, name, c_score, cpp_score, python_score):
        self.id = id
        self.name = name
        self.c_score = c_score
        self.cpp_score = cpp_score
        self.python_score = python_score
        self.total_score = c_score + cpp_score + python_score

class StudentManagementSystem:
    def __init__(self, master):
        self.master = master
        master.title("学生成绩管理系统")
        
        # 创建标签和文本框用于输入学生信息
        Label(master, text="学号").grid(row=0, column=0)
        self.id_entry = Entry(master)
        self.id_entry.grid(row=0, column=1)
        
        Label(master, text="姓名").grid(row=1, column=0)
        self.name_entry = Entry(master)
        self.name_entry.grid(row=1, column=1)
        
        Label(master, text="C成绩").grid(row=2, column=0)
        self.c_score_entry = Entry(master)
        self.c_score_entry.grid(row=2, column=1)
        
        Label(master, text="C++成绩").grid(row=3, column=0)
        self.cpp_score_entry = Entry(master)
        self.cpp_score_entry.grid(row=3, column=1)
        
        Label(master, text="Python成绩").grid(row=4, column=0)
        self.python_score_entry = Entry(master)
        self.python_score_entry.grid(row=4, column=1)
        
        # 创建按钮用于添加学生信息
        self.add_button = Button(master, text="添加学生信息", command=self.add_student)
        self.add_button.grid(row=5, column=0, columnspan=2)
        
        # 创建标签用于显示学生信息
        self.student_info_label = Label(master, text="")
        self.student_info_label.grid(row=6, column=0, columnspan=2)
        
        # 创建按钮用于按总分排序
        self.sort_button = Button(master, text="按总分排序", command=self.sort_students)
        self.sort_button.grid(row=7, column=0, columnspan=2)
        
        # 创建标签用于显示学生总分
        self.total_score_label = Label(master, text="")
        self.total_score_label.grid(row=8, column=0, columnspan=2)
        
        # 存储学生信息的列表
        self.students = []
        
    # 添加学生信息
    def add_student(self):
        try:
            id = int(self.id_entry.get())
            name = self.name_entry.get()
            c_score = float(self.c_score_entry.get())
            cpp_score = float(self.cpp_score_entry.get())
            python_score = float(self.python_score_entry.get())
            student = Student(id, name, c_score, cpp_score, python_score)
            self.students.append(student)
            self.id_entry.delete(0, END)
            self.name_entry.delete(0, END)
            self.c_score_entry.delete(0, END)
            self.cpp_score_entry.delete(0, END)
            self.python_score_entry.delete(0, END)
            messagebox.showinfo("成功", "学生信息添加成功！")
        except ValueError:
            messagebox.showerror("错误", "输入的学生信息格式不正确！")
    
    # 按总分排序
    def sort_students(self):
        self.students.sort(key=lambda x: x.total_score, reverse=True)
        text = ""
        for student in self.students:
            text += f"学号：{student.id}，姓名：{student.name}，总分：{student.total_score:.2f}\n"
        self.student_info_label.config(text=text)
        
        # 计算并显示每个学生的总分
        total_score_text = ""
        for student in self.students:
            total_score_text += f"{student.name}的总分为：{student.total_score:.2f}\n"
        self.total_score_label.config(text=total_score_text)
        

root = Tk()
my_gui = StudentManagementSystem(root)
root.mainloop()

这段代码使用了Python的tkinter模块创建了一个GUI窗口，包括了输入学生信息、显示学生信息、按总分排序和计算每个学生的总分等功能。同时，使用了Python的面向对象编程思想，定义了一个Student类和一个StudentManagementSystem类，方便管理和操作学生信息。