Python 2.6.4属性装饰器不起作用

问题描述

我看到了许多示例和介绍如何使用特殊的 getters 和在Python中创建属性>设置者。但是，我无法执行特殊的getter和setter方法，也无法使用 @property 装饰器将属性转换为 readonly 。

I've seen many examples online and in this forum of how to create properties in Python with special getters and setters. However, I can't get the special getter and setter methods to execute, nor can I use the @property decorator to transform a property as readonly.

我正在使用Python 2.6.4，这是我的代码。使用了不同的方法来使用属性，但均无效。

I'm using Python 2.6.4 and here is my code. Different methods to use properties are employed, but neither work.

class PathInfo:
    def __init__(self, path):
        self.setpath(path)

    def getpath(self):
        return self.__path

    def setpath(self, path):
        if not path:
            raise TypeError

        if path.endswith('/'):
            path = path[:-1]

        self.__path = path
        self.dirname = os.path.dirname(path)
        self.basename = os.path.basename(path)
        (self.rootname, self.dext) = os.path.splitext(self.basename)
        self.ext = self.dext[1:]

    path = property(fget=getpath, fset=setpath)

    @property
    def isdir(self):
        return os.path.isdir(self.__path)

    @property
    def isfile(self):
        return os.path.isfile(self.__path)

推荐答案

PathInfo 必须子类 object 。

像这样：

class PathInfo(object):

属性仅适用于新样式类。

Properties work only on new style classes.

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