python面向对象的学生信息管理系统

以下是一个简单的Python面向对象的学生信息管理系统的示例：

# 定义学生类
class Student(object):
    def __init__(self, name, age, gender):
        self.name = name
        self.age = age
        self.gender = gender

# 定义学生管理系统类
class StudentManager(object):
    def __init__(self):
        # 存储学员数据 -- 列表
        self.student_list = []

    # 添加学员
    def add_student(self, student):
        self.student_list.append(student)
        print("学员添加成功！")

    # 删除学员
    def delete_student(self, student):
        if student in self.student_list:
            self.student_list.remove(student)
            print("学员删除成功！")
        else:
            print("学员不存在！")

    # 修改学员信息
    def modify_student(self, student, new_name, new_age, new_gender):
        if student in self.student_list:
            student.name = new_name
            student.age = new_age
            student.gender = new_gender
            print("学员信息修改成功！")
        else:
            print("学员不存在！")

    # 查询学员信息
    def query_student(self, student):
        if student in self.student_list:
            print("学员姓名：", student.name)
            print("学员年龄：", student.age)
            print("学员性别：", student.gender)
        else:
            print("学员不存在！")

    # 显示所有学员信息
    def show_all_students(self):
        for student in self.student_list:
            print("学员姓名：", student.name)
            print("学员年龄：", student.age)
            print("学员性别：", student.gender)

    # 保存学员信息
    def save_students(self):
        # 将学员信息保存到文件中
        with open("students.txt", "w") as f:
            for student in self.student_list:
                f.write(student.name + "," + str(student.age) + "," + student.gender + "\n")
        print("学员信息保存成功！")

    # 退出系统
    def exit_system(self):
        self.save_students()
        print("学员信息管理系统已退出！")

# 创建学生管理系统对象
manager = StudentManager()

# 添加学员
student1 = Student("张三", 18, "男")
manager.add_student(student1)

# 修改学员信息
manager.modify_student(student1, "李四", 20, "女")

# 查询学员信息
manager.query_student(student1)

# 显示所有学员信息
manager.show_all_students()

# 删除学员
manager.delete_student(student1)

# 退出系统
manager.exit_system()