Python的高级特性10:无聊的@property

@property装饰器其实有点无聊,单独拿出来做为一个知识点其实不必,尽管它能够将方法变成属性,让get和set方法更好用,可是，它破坏了python的简洁(不是代码的简洁而是指语法上)。

下面来讲明为何我会这么说。

首先，看一个使用property。

class Student(object):

    @property
    def testname(self):
        return self.name

    @testname.setter
    def testname(self,name):
        self.name = name

s = Student()

s.testname = "alex"
print(s.testname)

结果是：

/System/Library/Frameworks/Python.framework/Versions/3.4/bin/python3 /Users/lsf/PycharmProjects/py3Project/test3.py
alex

Process finished with exit code 0

看上去的确好用,但其实python内置的__getattr__和__setattr__就是将方法变为属性功能的。

class Stu(object):
    def __init__(self):
        pass

    def __setattr__(self,name,value):
        self.__dict__[name] = value

    def __getattr__(self):
        return self.name



s = Stu()
s.name = 'alex'
print(s.name)

结果固然是：

/System/Library/Frameworks/Python.framework/Versions/3.4/bin/python3 /Users/lsf/PycharmProjects/py3Project/test3.py
alex

Process finished with exit code 0