class School:

    def __init__(self,name,address):

        self.name = name

        self.address = address

    def introduce(self):

        print('我们学校是好学校')

class Course:

    def __init__(self,name,price,period,school):

        self.name =name

        self.price =price

        self.period =period

        self.school =school

s1 = School('qinghua','beijing')

s2 = School('qinghua','nanjing')

s3 = School('qinghua','hebei')

c1 = Course('linux',1000,'1h',s1)

print(c1.__dict__)                 # 查看信息

print(c1.school.name)

{'name': 'linux', 'price': 1000, 'period': '1h', 'school': <__main__.School object at 0x0056DE50>}

qinghua

Process finished with exit code 0