__init__() 内外变量的区别 [英] difference between variables inside and outside of __init__()

问题描述

除了名称之外，这些类之间还有什么区别吗?

Is there any difference at all between these classes besides the name?

class WithClass ():
    def __init__(self):
        self.value = "Bob"
    def my_func(self):
        print(self.value)

class WithoutClass ():
    value = "Bob"

    def my_func(self):
        print(self.value)

如果我使用或不使用 __init__ 方法来声明变量 value 有什么区别吗?

Does it make any difference if I use or don't use the __init__ method for declaring the variable value?

我主要担心的是我会以一种方式使用它，这会给我带来更多的问题.

My main worry is that I'll be using it one way, when that'll cause me further problems down the road.

推荐答案

__init__ 之外的变量集属于类.它们由所有实例共享.

Variable set outside __init__ belong to the class. They're shared by all instances.

在__init__(以及所有其他方法函数)内部创建并以self. 开头的变量属于对象实例.

Variables created inside __init__ (and all other method functions) and prefaced with self. belong to the object instance.

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