python学生管理系统

学生管理系统可以使用Python编写，主要包含以下功能：

1. 学生信息的录入、修改、删除、查询等操作；
2. 学生课程的选修、成绩的录入、修改、查询等操作；
3. 统计学生课程成绩、班级平均成绩、学生总成绩等数据；
4. 生成各种报表，如学生成绩报表、班级成绩分析报表等。

下面是一个简单的学生管理系统的代码示例：

import os
import pickle

class Student:
    def __init__(self, name, age, gender, id):
        self.name = name
        self.age = age
        self.gender = gender
        self.id = id
        self.courses = {}

    def add_course(self, course, score):
        self.courses[course] = score

    def __str__(self):
        return f'{self.id}\t{self.name}\t{self.gender}\t{self.age}'

class StudentManager:
    def __init__(self):
        self.students = {}

    def add_student(self, student):
        self.students[student.id] = student

    def remove_student(self, id):
        del self.students[id]

    def modify_student(self, id, name, age, gender):
        student = self.students[id]
        student.name = name
        student.age = age
        student.gender = gender

    def add_score(self, id, course, score):
        student = self.students[id]
        student.add_course(course, score)

    def get_student(self, id):
        return self.students.get(id)

    def get_all_students(self):
        return self.students.values()

    def save(self, filename):
        with open(filename, 'wb') as f:
            pickle.dump(self.students, f)

    def load(self, filename):
        if os.path.exists(filename):
            with open(filename, 'rb') as f:
                self.students = pickle.load(f)

if __name__ == '__main__':
    manager = StudentManager()
    manager.load('students.dat')

    while True:
        print('1. 添加学生')
        print('2. 删除学生')
        print('3. 修改学生')
        print('4. 添加成绩')
        print('5. 查询学生')
        print('6. 查询所有学生')
        print('7. 保存数据')
        print('8. 退出系统')

        choice = input('请选择操作：')

        if choice == '1':
            id = input('请输入学号：')
            name = input('请输入姓名：')
            age = input('请输入年龄：')
            gender = input('请输入性别：')
            student = Student(name, age, gender, id)
            manager.add_student(student)
            print('添加成功！')

        elif choice == '2':
            id = input('请输入学号：')
            manager.remove_student(id)
            print('删除成功！')

        elif choice == '3':
            id = input('请输入学号：')
            name = input('请输入姓名：')
            age = input('请输入年龄：')
            gender = input('请输入性别：')
            manager.modify_student(id, name, age, gender)
            print('修改成功！')

        elif choice == '4':
            id = input('请输入学号：')
            course = input('请输入课程名：')
            score = input('请输入成绩：')
            manager.add_score(id, course, score)
            print('添加成功！')

        elif choice == '5':
            id = input('请输入学号：')
            student = manager.get_student(id)
            if student:
                print(student)
                for course, score in student.courses.items():
                    print(f'{course}\t{score}')
            else:
                print('查无此人！')

        elif choice == '6':
            students = manager.get_all_students()
            for student in students:
                print(student)

        elif choice == '7':
            manager.save('students.dat')
            print('保存成功！')

        elif choice == '8':
            break

        else:
            print('无效操作！')