Python内置函数property()使用实例

class Shuxing():
    def __init__(self, size = 10):
        self.size = size
    def getSize(self):
        print('getSize')
        return self.size
    def setSize(self, value):
        print('setSize')
        self.size = value
    def delSize(self):
        print('delSize')
        del self.size
    x = property(getSize, setSize, delSize)

sx=Shuxing(100)
print('1',sx.x)    #获取x，执行getSize方法
sx.x=1000     #设置x，执行setSize方法
print('2',sx.x)     #获取x，执行getSize方法
del sx.x    # 删除x，执行delSize方法

print('3',sx.size)     # 获取x，执行getSize方法，但是此时size已被删除，所以会报错　

getSize
1 100
Traceback (most recent call last):
setSize
getSize
  File "D:/PycharmProjects/flask_demo/a.py", line 21, in <module>
2 1000
delSize
    print('3',sx.size)
AttributeError: 'Shuxing' object has no attribute 'size'

Process finished with exit code 1