4.7---选课系统（面向对象，整合数据与功能）

选课系统

选课系统项目中涉及到诸多数据与功能，要求引入面向对象的思想对其进行高度整合
　　1、学校数据与功能整合
　　2、课程数据与功能进行整合
　　3、学生数据与功能进行整合
　　4、讲师数据与功能进行整合
　　5、班级数据与功能进行整合
数据部分：
     校区的名字：如"老男孩上海校区"
     校区的地址：如"上海虹桥"

     班级名字
     班级所在校区

     学生的学校
     学生的姓名
     学生的年龄
     学号
     学生的性别

     课程名字
     课程周期
     课程价格

     老师的名字
     老师的年龄
     老师的薪资
     老师的等级

功能部分：
     校区创建完毕后，可以为每个校区创建班级
     班级创建完毕后，可以为每个班级创建课程
     学生创建完毕后，学生可以选择班级
     老师创建完毕后，可以为学生打分

1、定义类与实例化

class School():
    def __init__(self,school_name,address):
        self.school_name = school_name
        self.school_address = address
        self.class_dict = {}
        self.stu_dict = {}

    def create_class(self,class_name):
        c1 = Class(class_name,self.school_name)
        self.class_dict[c1.class_name] = c1.curriculum_dict
        return c1

    def recruit_student(self,stu_name,stu_age,stu_num,stu_gender):
        stu = Student(self.school_name,stu_name,stu_age,stu_num,stu_gender)
        self.stu_dict[stu_name] = [stu.stu_age,stu.stu_num,stu.stu_gender,stu.stu_class]
        return stu

class Class():
    def __init__(self, class_name, campus):
        self.campus = campus
        self.class_name = class_name
        self.curriculum_dict = {}
        self.stu_list = {}

    def create_curriculum(self,curriculum_name,curriculum_peroid,curriculum_price):
        cur = Curriculum(curriculum_name,curriculum_peroid,curriculum_price)
        self.curriculum_dict[curriculum_name] = [curriculum_peroid,curriculum_price]
        return cur

#      学生的学校
#      学生的姓名
#      学生的年龄
#      学号
#      学生的性别
#      学生创建完毕后，学生可以选择班级
class Student():
    def __init__(self,school,name,age,num,gender):
        self.stu_school = school
        self.stu_name = name
        self.stu_age = age
        self.stu_num = num
        self.stu_gender = gender
        self.stu_class = {}
        self.stu_grade = None

    def chose_class(self,c):
        self.stu_class["班级"]= c.class_name
        self.stu_class["课程"]= c.curriculum_dict
        c.stu_list[self.stu_name] = [self.stu_age,self.stu_num,self.stu_gender]

#      老师的名字
#      老师的年龄
#      老师的薪资
#      老师的等级
#      老师创建完毕后，可以为学生打分
class Teacher():
    def __init__(self,tea_name,tea_age,tea_salary,tea_class):
        self.tea_name = tea_name
        self.tea_age = tea_age
        self.tea_salary = tea_salary
        self.tea_class = tea_class
        self.stu_list = {}

    def grade(self,stu,grade):
        stu.stu_grade = grade
        self.stu_list[stu.stu_name] = grade



class Curriculum():
    def __init__(self,name,period,price):
        self.curriculum_name = name
        self.curriculum_period = period
        self.curriculum_price = price
        with open("db.txt",mode='wt',encoding="utf-8") as f:
            f.write(name)

s1 = School("西南大学","天生街道")
c1 = s1.create_class("Class 1")

curriculum_Python = c1.create_curriculum("Python","6 months","20000")
curriculum_Math = c1.create_curriculum("Math","12 months","100000")

stu1 = s1.recruit_student("Jil",20,666666,"male")
stu1.chose_class(c1)
stu2 = s1.recruit_student("Fishball",18,188741,"female")
stu2.chose_class(c1)

t1 = Teacher("egon",18,50000,"A")

t1.grade(stu1,99)
t1.grade(stu2,59)

print("学校属性：
",s1.__dict__,end="

")
print("班级属性：
",c1.__dict__,end="

")
print("学生1属性：
",stu1.__dict__,end="

")
print("学生2属性：
",stu2.__dict__,end="

")
print("老师属性：
",t1.__dict__,end="

")

2、运行结果

学校属性：
 {'school_name': '西南大学', 'school_address': '天生街道', 'class_dict': {'Class 1': {'Python': ['6 months', '20000'], 'Math': ['12 months', '100000']}}, 'stu_dict': {'Jil': [20, 666666, 'male', {'班级': 'Class 1', '课程': {'Python': ['6 months', '20000'], 'Math': ['12 months', '100000']}}], 'Fishball': [18, 188741, 'female', {'班级': 'Class 1', '课程': {'Python': ['6 months', '20000'], 'Math': ['12 months', '100000']}}]}}

班级属性：
 {'campus': '西南大学', 'class_name': 'Class 1', 'curriculum_dict': {'Python': ['6 months', '20000'], 'Math': ['12 months', '100000']}, 'stu_list': {'Jil': [20, 666666, 'male'], 'Fishball': [18, 188741, 'female']}}

学生1属性：
 {'stu_school': '西南大学', 'stu_name': 'Jil', 'stu_age': 20, 'stu_num': 666666, 'stu_gender': 'male', 'stu_class': {'班级': 'Class 1', '课程': {'Python': ['6 months', '20000'], 'Math': ['12 months', '100000']}}, 'stu_grade': 99}

学生2属性：
 {'stu_school': '西南大学', 'stu_name': 'Fishball', 'stu_age': 18, 'stu_num': 188741, 'stu_gender': 'female', 'stu_class': {'班级': 'Class 1', '课程': {'Python': ['6 months', '20000'], 'Math': ['12 months', '100000']}}, 'stu_grade': 59}

老师属性：
 {'tea_name': 'egon', 'tea_age': 18, 'tea_salary': 50000, 'tea_class': 'A', 'stu_list': {'Jil': 99, 'Fishball': 59}}