# -*- coding:utf-8 -*-
class Classes:
    def __init__(self,school,name,kind):
        self.school = school #学校
        self.name = name     #班级名称python01
        self.kind = kind     #班级科目 python/linux/go
        self.student = ['student_obj']
class Course:
    def __init__(self,name,period,price):
        self.name = name     #课程名
        self.period = period #课程周期
        self.price = price   #课程价格
c = Course('python','6 month',19800)
class Teacher:
    def __init__(self,name):
        self.name = name
t = Teacher('lin')
t.cource = c
print(t.cource.period)