Python 我的代码总是得到一个“quot；名称'；繁殖'；“未定义”；错误

我的错误是：

NameError: name 'breed' is not defined

但是我认为它是在

\uuuu init\uuu

函数中定义的？有什么建议吗？这是一个考试学习指南中的代码，我试图自己将其输入到Python2.7中以查看输出

class Dog(object):
    def __init__(self, breed, owner = "pound"):
        self.owner = owner
        self.breed = breed

    @property
    def owner(self):
        return self._owner

    @owner.setter
    def owner(self, value):
        self._owner = value

    @breed.setter
    def breed(self, value):
        self._breed = value

    def __str__(self):
        return "Breed = {}, \tOwner = {}".format(\
                self.breed, self.owner)

d1 = Dog("Beagle")
d2 = Dog("Rottweiler", "James")
d3 = Dog("Poodle")
print "d1: {}".format(d1)
print "d2: {}".format(d2)
print "d3: {}".format(d3)

---

您还应该拥有该品种的

@property

：

class Dog(object):
    def __init__(self, breed, owner = "pound"):
        self.owner = owner
        self.breed = breed

    @property
    def owner(self):
        return self._owner

    @owner.setter
    def owner(self, value):
        self._owner = value

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

    @breed.setter
    def breed(self, value):
        self._breed = value

    def __str__(self):
        return "Breed = {}, \tOwner = {}".format(\
                self.breed, self.owner)

d1 = Dog("Beagle")
d2 = Dog("Rottweiler", "James")
d3 = Dog("Poodle")
print "d1: {}".format(d1)
print "d2: {}".format(d2)
print "d3: {}".format(d3)

---

添加getter:

@property def bread（self）：返回self.\u breed

您为

所有者做得很好，您只需为
breed
做同样的事情。