选课系统初见

coding:utf-8

from db import db_handler

父类

class Base:
# 保存数据(对象)方法
def save_obj(self):
db_handler.save(self)

# 查看数据(对象)方法
@classmethod
def select_obj(cls, obj_name):
    obj = db_handler.select(cls, obj_name)
    return obj

人类

class People(Base):
def init(self, name, password):
self.__name = name
self.__pwd = password
@property
def user_name(self):
return self.__name

@user_name.setter
def user_name(self, name, password):
    if type(name) is not str:
        print('请输入字符串名字')
        return
    self.__name = name
    self.__pwd = password
    self.save_obj()

@user_name.deleter
def user_name(self):
    print('不能删除')

学校类

class School(Base):
school_name = 'OLDBOY'

def __init__(self, name, addr):
    self.name = name
    self.addr = addr
    self.__class_list = []
    self.save_obj()

def related_class(self, class_obj):
    self.__class_list.append(class_obj)
    self.save_obj()

@property
def tell_school_class(self):
    print(f'{self.name}:')
    for class_obj in self.__class_list:
        class_obj.tell_class_course()

@property
def classes(self):
    return self.__class_list

班级类

class Class(Base):
def init(self, name):
self.name = name
self.course = None
self.student_list = []
self.save_obj()

def related_course(self, course_obj):
    self.course = course_obj
    self.save_obj()

@property
def tell_class_course(self):
    self.course.tell_info()


def add_student(self, student_obj):
    self.student_list.append(student_obj)
    self.save_obj()

@property
def tell_all_student(self):
    if self.student_list:
        print(f'班级：{self.name}'.center(50, '='))
        for student_obj in self.student_list:
            print(student_obj.name)
    else:
        print('该班级下无学生')

@property
def tell_student_score(self):
    print(f'课程：{self.course.name}:', end='')
    for student_obj in self.student_list:
        print(f'{student_obj.user_name}:{student_obj.score[self.name]}')

课程类

class Course(Base):
def init(self, course_name, course_price, course_time):
self.name = course_name
self.price = course_price
self.time = course_time

    self.save_obj()

def tell_info(self):
    print(f'<课程：{self.name}  价格：{self.price}  周期:{self.time}>')

学生类

class Student(People):
def init(self, student_name, student_pwd):
People.init(self, student_name, student_pwd)
self.school = None
self.course_list = []
self.score = {}
self.save_obj()

# 选择学校
def choice_school(self, school_obj):
    self.school = school_obj.name
    self.save_obj()

# 选择课程
def choice_course(self, course_obj):
    self.course_list.append(course_obj)
    self.score[course_obj.name] = 0
    # 课程下也需要添加学生
    course_obj.add_student(self)
    self.save_obj()

def tell_courses_score(self):
    print(f'学生：{self.__name}'.center(50, '='))
    for course_obj in self.course_list:
        print(f'课程:{course_obj.name}  分数：[{self.score[course_obj.name]}]')


def tell_all_courses(self):
    print(f'学生{self.__name}的课程'.center(50, '='))
    for course_obj in self.course_list:
        print(f'{course_obj.name} ')

class Admin(People):
def init(self, name, pwd):
People.init(self, name, pwd)
self.save_obj()

def create_school(self, school_name, school_addr):
    School(school_name, school_addr)
    self.save_obj()

def create_class(self, class_name):
    Class(class_name)

def create_course(self, course_name, price, date_time):
    Course(course_name, price, date_time)

class Teacher(People):
def init(self, teacher_name, teacher_pwd):
People.init(self, teacher_name, teacher_pwd)
self.__class_list = []
self.save_obj()

@property
def classes(self):
    if not self.__class_list:
        return '未选择班级'
    return self.__class_list

@classes.setter
def classes(self, class_obj):
    self.__class_list.append(class_obj)
    self.save_obj()
#查看班级下的学生
def check_student_of_class(self, class_obj):
    return class_obj.tell_all_student

#查看班级所有学生的课程分数
def check_course_of_student(self, class_obj):
    return class_obj.tell_class_course

teacher_obj = Teacher('egon', 123)

# teacher_obj.classes = '脱产 1 期'

print(teacher_obj.classes)