python学习-63 组合

组合

1.什么是组合？

定义一个类，由数据属性构成，这几个属性又可以是通过一个类实例化的对象，这就是组合。

举例：

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)

运行结果：

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

Process finished with exit code 0