class Student:def register(self):print("=============注册页面=============")n = 3user = input("请输入账号：").strip()while n > 0:n = n -1pass_wd = input("请输入密码:").strip()pass_wd_sec = input("确认你的密码:").strip()if pass_wd != pass_wd_sec:print("两次输入不一致，请重新输入！\n")print("你还有" + str(n) + "次机会!")continueelse:print("注册成功！\n")user_info[user] = pass_wd_secbreakdef login(self):n = 3while n > 0:n = n - 1pass_wd = input("请输入你的密码:").strip()if pass_wd != user_info[user]:print("密码错误，请重新输入！\n")print("你还有" + str(n) + "次机会！")continueelse:print("登录成功!\n")breakdef achievement(self):# 这里实现成绩录入与成绩查询print("请录入你的成绩！")while True:subject_name = input("课程名称：")score = int(input("课程分数"))student_score[subject_name] = scorestatus = input("\n选择你的操作  【0:继续，1:查看，其他:退出】")if status == '0':continueelif status == '1':choice = input("请输入你要查看的课程名称：【1:全部，其他:当前】")if choice == '1':print(student_score)else:print(student_score[choice])else:breakdef course_selection(self):all_course = ['java', 'hadoop']my_course = []while True:print("\n你当前的课程有：" + str(my_course))print("\n当前可选的课程有：" + str(all_course))course_name = input("请输入你要选择的课程:")my_course.append(course_name)print("选课结果为：" + str(my_course))breakif __name__ == '__main__':user_info = {"hadoop": "111", "hive": "222", "spark": "333"}student_score = {"语文": 86, "数学": 96, "英语": 81, "化学": 91, "物理": 92}user = input("请输入账号：").strip()s = Student()if user not in user_info.keys():print("账号不存在，请返回注册\n")s.register()print("=============登录界面=============")user = input("请输入账号：").strip()s.login()s.achievement()else:s.login()s.achievement()s.course_selection()