import pickle


class Course(object):
    def __init__(self, name, price, period):
        self.name = name
        self.price = price
        self.period = period


class Student(object):
    def __init__(self, name):
        self.name = name
        self.classes = []
    def show_courses(self):
        pass
    def choose_course(self):
        pass
    def show_selected(self):
        pass
    def exit(self):
        pass


class Manager(object):
    opt_list = [(‘创建课程‘, ‘create_course‘), (‘创建学生‘, ‘create_student‘),
                (‘查看课程‘, ‘show_courses‘), (‘查看学生‘, ‘show_students‘),
                (‘查看学生和已选课程‘, ‘show_stu_course‘), (‘退出‘, ‘exit‘)]
    def __init__(self, name):
        self.name = name
    def create_course(self):
        pass
    def create_student(self):
        user = input(‘usename: ‘)
        pwd = ‘123456‘
        stu = Student(user)
        ‘‘‘
        ？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？
        重复创建问题
        ‘‘‘
        with open(‘userInfo‘, mode=‘a‘, encoding=‘utf-8‘) as f:
            print(f‘{user}|{pwd}|student‘, file=f)
        with open(‘studentInfo‘, mode=‘ab‘) as f:
            pickle.dump(stu, f)
        print(f‘学生{user}创建成功‘)
        ‘‘‘
        ？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？
        打log问题，***老师在***时间创建了学生***
        ‘‘‘
    def show_courses(self):
        pass
    def show_students(self):
        pass
    def show_stu_course(self):
        pass
    def exit(self):
        pass


def login():
    ‘‘‘
    None
    :return: 登陆成功，返回用户名和身份；否则，返回false
    ‘‘‘
    username = input(‘username:‘)
    password = input(‘password:‘)
    with open(‘userinfo‘) as f:
        for line in f:
            user, pwd, ident = line.strip().split(‘|‘)
            if username == user and password == pwd:
                return username, ident
    return False


ret = login()
if ret:
    print(f‘登录成功，{ret[0]}欢迎使用选课系统‘)
    if ret[1] == ‘manager‘:
        m = Manager(ret[0])
        for i, opt in enumerate(Manager.opt_list, 1):
            print(i, opt[0])
        num = int(input(‘您需要选择的操作：‘))
        if hasattr(m, Manager.opt_list[num-1][1]):
            getattr(m, Manager.opt_list[num-1][1])()


else:
    print(‘登陆失败‘)

选课系统