用pytho写一个大学生选课系统

好的，一个基本的大学生选课系统需要包含以下功能：

1. 学生账号管理：包括学生注册、登录、修改密码等功能。

2. 课程管理：包括课程信息查询、选课、退课等功能。

3. 学生信息管理：包括学生个人信息修改、查询等功能。

以下是一个简单的Python代码示例，实现基本的大学生选课系统：

# 定义学生类
class Student:
    def __init__(self, id, name, password):
        self.id = id
        self.name = name
        self.password = password
        self.courses = []  # 学生已选课程列表

    def select_course(self, course):
        self.courses.append(course)

    def withdraw_course(self, course):
        self.courses.remove(course)

    def display_info(self):
        print(f"学生ID: {self.id}\n姓名: {self.name}\n已选课程: {self.courses}")

# 定义课程类
class Course:
    def __init__(self, id, name, teacher):
        self.id = id
        self.name = name
        self.teacher = teacher

    def display_info(self):
        print(f"课程ID: {self.id}\n课程名称: {self.name}\n授课教师: {self.teacher.name}")

# 定义教师类
class Teacher:
    def __init__(self, id, name):
        self.id = id
        self.name = name

# 定义学生管理系统类
class StudentManagementSystem:
    def __init__(self):
        self.students = []  # 学生列表
        self.courses = []  # 课程列表
        self.teachers = []  # 教师列表

    def register_student(self):
        student_id = input("请输入学生ID: ")
        student_name = input("请输入学生姓名: ")
        student_password = input("请输入密码: ")
        self.students.append(Student(student_id, student_name, student_password))
        print("注册成功！")

    def login_student(self):
        student_id = input("请输入学生ID: ")
        student_password = input("请输入密码: ")
        for student in self.students:
            if student.id == student_id and student.password == student_password:
                print(f"{student.name}，欢迎登录！")
                return student
        print("账号或密码错误！")
        return None

    def modify_student_password(self, student):
        new_password = input("请输入新密码: ")
        student.password = new_password
        print("密码修改成功！")

    def query_course_info(self):
        for course in self.courses:
            course.display_info()

    def select_course(self, student):
        self.query_course_info()
        course_id = input("请输入要选的课程ID: ")
        for course in self.courses:
            if course.id == course_id:
                student.select_course(course)
                print("选课成功！")
                return
        print("该课程不存在！")

    def withdraw_course(self, student):
        student.display_info()
        course_id = input("请输入要退的课程ID: ")
        for course in student.courses:
            if course.id == course_id:
                student.withdraw_course(course)
                print("退课成功！")
                return
        print("该课程不存在！")

    def modify_student_info(self, student):
        new_name = input("请输入新姓名: ")
        student.name = new_name
        print("个人信息修改成功！")

    def run(self):
        while True:
            print("请选择操作：")
            print("1. 学生注册")
            print("2. 学生登录")
            print("3. 修改密码")
            print("4. 查询课程信息")
            print("5. 选课")
            print("6. 退课")
            print("7. 修改个人信息")
            print("0. 退出系统")
            choice = input()
            if choice == "1":
                self.register_student()
            elif choice == "2":
                student = self.login_student()
                if student:
                    while True:
                        print("请选择操作：")
                        print("1. 修改密码")
                        print("2. 查询课程信息")
                        print("3. 选课")
                        print("4. 退课")
                        print("5. 修改个人信息")
                        print("0. 退出登录")
                        choice = input()
                        if choice == "1":
                            self.modify_student_password(student)
                        elif choice == "2":
                            self.query_course_info()
                        elif choice == "3":
                            self.select_course(student)
                        elif choice == "4":
                            self.withdraw_course(student)
                        elif choice == "5":
                            self.modify_student_info(student)
                        elif choice == "0":
                            break
            elif choice == "3":
                student = self.login_student()
                if student:
                    self.modify_student_password(student)
            elif choice == "4":
                self.query_course_info()
            elif choice == "5":
                student = self.login_student()
                if student:
                    self.select_course(student)
            elif choice == "6":
                student = self.login_student()
                if student:
                    self.withdraw_course(student)
            elif choice == "7":
                student = self.login_student()
                if student:
                    self.modify_student_info(student)
            elif choice == "0":
                print("谢谢使用！")
                break
            else:
                print("输入有误，请重新输入！")

# 初始化学生管理系统
sms = StudentManagementSystem()
# 添加课程和教师
math_teacher = Teacher("T001", "张三")
english_teacher = Teacher("T002", "李四")
sms.teachers = [math_teacher, english_teacher]
math_course = Course("C001", "高等数学", math_teacher)
english_course = Course("C002", "大学英语", english_teacher)
sms.courses = [math_course, english_course]
# 运行学生管理系统
sms.run()

以上代码只是一个简单的示例，实际的大学生选课系统需要更完善的功能和更复杂的实现。