博客
关于我
class类中def函数必须要(self)吗?
阅读量:365 次
发布时间:2019-03-04

本文共 283 字,大约阅读时间需要 1 分钟。

在编写Python类中的方法时,自定义参数`self`在许多资料中被强调为必须的。这种机制与解释器之间建立了一种默认的存储和读取机制。然而,通过具体实例可以看出,`self`并非在所有情况下都必须存在。

class Person:      def run():          print("没有self")  Person.run() # 直接运行run

运行代码可见,直接通过类属性调用函数时,并不需要设置`self`参数。然而,当使用实例化调用方法时,`self`参数是必不可少的。因为它用于将实例与方法参数建立联系,确保方法能够正确地处理对象属性和状态。

转载地址:http://atbr.baihongyu.com/

你可能感兴趣的文章
NN&DL4.3 Getting your matrix dimensions right
查看>>
NN&DL4.8 What does this have to do with the brain?
查看>>
No 'Access-Control-Allow-Origin' header is present on the requested resource.
查看>>
NO 157 去掉禅道访问地址中的zentao
查看>>
No Datastore Session bound to thread, and configuration does not allow creation of non-transactional
查看>>
No fallbackFactory instance of type class com.ruoyi---SpringCloud Alibaba_若依微服务框架改造---工作笔记005
查看>>
No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalanc
查看>>
No mapping found for HTTP request with URI [/...] in DispatcherServlet with name ...的解决方法
查看>>
No mapping found for HTTP request with URI [/logout.do] in DispatcherServlet with name 'springmvc'
查看>>
No module named 'crispy_forms'等使用pycharm开发
查看>>
No module named cv2
查看>>
No module named tensorboard.main在安装tensorboardX的时候遇到的问题
查看>>
No module named ‘MySQLdb‘错误解决No module named ‘MySQLdb‘错误解决
查看>>
No new migrations found. Your system is up-to-date.
查看>>
No qualifying bean of type XXX found for dependency XXX.
查看>>
No resource identifier found for attribute 'srcCompat' in package的解决办法
查看>>
no session found for current thread
查看>>
No toolchains found in the NDK toolchains folder for ABI with prefix: mips64el-linux-android
查看>>
NO.23 ZenTaoPHP目录结构
查看>>
NO32 网络层次及OSI7层模型--TCP三次握手四次断开--子网划分
查看>>