python property

fanruitian2026-10-23 9:43

复制代码

property用在面向对象中，用户简化代码，getter setter方法像成员变量一样调用

另外python在定义class的时候与java有所不同，

class Student，class Student（），class Student(object) 没有任何区别，其中object代表继承

变量前加双下划线代表私有变量，不需要像java加private关键字

复制代码

import time


class Student(object):
    def __init__(self,name,gender="nan",address="No Address"):
        self.__name = name
        self.__gender = gender
        self.__address = address

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

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

    def __str__(self):
        return f"name is {self.__name}, gender is {self.__gender}, address is {self.__address}"

    def __del__(self):
        print(f"Student {id(self)} has been deleted")

    def run(self):
        print(f"Student is run.....")



if __name__ == '__main__':
    s = Student(name="zhangsan");
    s.name = "dsfsfsfs"
    print(s)
    s.run()
    time.sleep(1)
    print("after sleep 1s")

name is dsfsfsfs, gender is nan, address is No Address

Student is run.....

after sleep 1s

Student 1161272647632 has been deleted

最后del调用时因为程序结束，对象被回收