python选课系统demo的小练习

#简化选课系统代码:先登陆,然后判断身份并实例化,根据身份对应的类,让用户选择

class Manager:

    operate_dict=[

        ('创造学生账号',"creat_student"),

        ('查看学生信息',"check_student")

                 ]

    def __init__(self,name):

        self.name=name

    def creat_student(self):

        print('创建学生账号')

    def check_student(self):

        print('查看学生信息')

class Student:

    def __init__(self, name):

        self.name = name

    def check(cls):

        print('查看课程')

    def login(cls):

        print('登录')

class Teacher:

    def __init__(self, name):

        self.name = name

def login():

    username=input('user:')

    password=input('password:')

    with open('userinfo')as f:

        for line in f :

            user,pwd,ident=line.strip().split('|')

            if user==username and pwd==password:

                print('登陆成功')

                return username,ident

import sys

def main():

    usr,id=login()

    file=sys.modules['__main__']

    cls=getattr(file,id)

    obj=cls(usr)

    Operate_dict=cls.operate_dict

    print(Operate_dict)

    for num,item in enumerate(Operate_dict):

        print(num,item[0])

    choice=int(input("num>>>"))

    choice_item=Operate_dict[choice-1]

    getattr(obj.choice_item[1])()

main()