Question

我在这里设置了一个简单的课程。我想要发生的是＆＃39;打印消息＆＃39;在我设置属性＆＃39; 信息＆＃39;时打印类对象卡车。

设置info属性c.info = "Great"时似乎没有发生任何事情我希望它可以打印＆＃34;这是设置＆＃34;

# Classes
class Node(object):
    def __init__(self, name, age):
        self.name = name
        self.age = age

class Truck(Node):
    def __init__(self, name="", age=0):
        super(Truck, self).__init__(name=name, age=age)
        self.info = None

        @property
        def info(self):
            return self.info

        @info.setter
        def info(self):
            print "this is being set"


c = Truck()
c.info = "great"
print c.info

Answer 1

setter需要value。此外，将数据存储在self._info中，以避免对self.info()进行递归调用。

class Node(object):
    def __init__(self, name, age):
        self.name = name
        self.age = age

class Truck(Node):
    def __init__(self, name="", age=0):
        super(Truck, self).__init__(name=name, age=age)
        self._info = None

    @property
    def info(self):
        return self._info

    @info.setter
    def info(self, value):
        # you likely want to it here
        self._info = value
        print("this is being set")


c = Truck()
c.info = "great"
print(c.info)

打印：

this is being set
great

Python - 类对象属性设置器无法正常工作

1 个答案: