学校管理系统代码未完成版

代码还没完成，遇到了瓶颈，请看的朋友留言给我，给点建议，完善一下

import datetime

class School(object):
    '''总部学校类'''
    def __init__(self,name,addr,website):
        self.name = name
        self.addr = addr
        self.branches = {}    #下属分校
        self.website = website
        self.balance = 0
        print("创建了一个校区[%s],地址在[%s]" % (name,addr))

    def count_staff_num(self):
        pass

    def staff_enrollment(self,staff_obj):
        pass

    def count_total_revenue(self):
        pass

class BranchSchool(School):
    '''分校'''
    def __init__(self,name,addr,headquarter_obj):
        super().__init__(name,addr)
        self.headquarter_obj = headquarter_obj
        self.headquarter_obj.branches[name] =self


class Course(object):
    '''课程'''
    def __init__(self,name,price,outline):
        self.name = name
        self.price = price
        self.outline = outline
        print("创建了课程[%s],学费[%s]" % (name,price))

class Class(object):
    '''班级'''
    def __init__(self,course_obj,semester,school_obj):
        self.course_obj = course_obj
        self.semester = semester
        self.school_obj = school_obj
        self.stu_list = []

        print("校区[%s]创建了班级[%s]-学期[%s].." %(school_obj.name,course_obj.name,semester))

    def stu_transfer(self,stu_obj,new_class_obj):
        stu_obj.append(new_class_obj)
        print("学员[%s]转学了.." % (stu_obj))

    def stu_dropout(self,stu_obj):
        print("学员[%s]退学了..." % (stu_obj))

class Staff(object):
    '''员工类'''
    def __init__(self,name,age,salary,dept,position,school_obj):
        self.name = name
        self.age = age
        self.salary = salary
        self.dept = dept
        self.position = position
        self.school_obj = school_obj

    def punch_card(self):
        print("员工[%s]正常上班打卡..." % (self.name))

class Teacher(Staff):
    def __init__(self,name,age,salary,dept,position,school_obj,course_obj):
        super().__init__(self,name,age,salary,dept,position)
        self.course_obj = course_obj  #老师可以讲的课
    def teach_class(self,class_obj,day):
        print("老师[%s]正在班级[%s]上第[%s]天课" % (self.name,class_obj,day))

class Student(object):
    '''学员'''
    def __init__(self,name,age,class_obj,balance):
        self.name = name
        self.age = age
        self.class_obj = class_obj
        self.balance = balance

        #加入班级
        self.class_obj.stu_list.append(self)

        #交学费
    def pay_tuition(self,class_obj,name):

        self.balance -= class_obj.course_obj.price
        self.class_obj.school_obj.balance += class_obj.course_obj.price

        print("班级[%s]加入了新学员[%s]，交费[%s]" %(class_obj,name,class_obj.course_obj.price))




    def punch_card(self):
        print("%s:学员在班级[%s]上课了。。。" % (datetime.datetime.now(),self.class_obj))


#创建校区
headquarter = School("老男孩IT教育集团","北京昌平沙河","oldboy.com")
sh1_school = School("张江校区","上海张江","oldboyedu.com")
sh2_school = School("虹桥校区","上海虹桥","oldboyedu.com")
luffy = School("深圳校区","深圳大学城","oldboyedu.com")


#创建课程
py_course = Course("Python开发","25800","None")
linux_course = Course("Linux运维","20000","None")
go_course = Course("GO开发","30000","None")

#创建班级
class1 = Class(py_course,24,headquarter)
class2 = Class(go_course,5,headquarter)
class3 = Class(py_course,12,sh1_school)

#创建员工、老师、员工
s1 = Staff("Alex",26,4000,"CEO","总经办",luffy)
s2 = Staff("Todd",45,60000,"CEO","总经办",headquarter)
s3 = Staff("明月",24,7000,"HR","HR",headquarter)

t1 = Teacher("日天",28,30000,"讲师","教学部",py_course,headquarter)
t2 = Teacher("Egon",28,30000,"讲师","教学部",linux_course,sh1_school)
t3 = Teacher("佩奇",29,40000,"学科带头人","教学部",py_course,sh2_school)

stu1 = Student("春生",22,class1,50000)
stu2 = Student("black girl",22,class3,30000)
stu3 = Student("小强",22,class2,35000)


for i in (stu1,stu2,stu3):
    i.pay_tuition()
    print(class1.stu_list)

sh1_school.show_balance()
sh2_school.show_balance()
luffy.show_balance()

headquarter.count_total_revenue()
headquarter.count_staff_num()