求真相__Python类属性的问题

miao_mi

首先上代码 :

class Class_A :
    test = 'a0'

object_A = Class_A()

print("Class_A.test = " , Class_A.test)
print("object_A.test = " , object_A.test)
print("====================================")

Class_A.test = 'a1'

print("Class_A.test = " , Class_A.test)
print("object_A.test = " , object_A.test)
print("====================================")

object_A.test = 'a2'

print("Class_A.test = " , Class_A.test)
print("object_A.test = " , object_A.test)
print("====================================")

Class_A.test = 'a3'

print("Class_A.test = " , Class_A.test)
print("object_A.test = " , object_A.test)
print("====================================")


我以前是写Java的, 所以对动态语言不是很了解. 我一直不明白这里为什么通过对象调用类的属性会产生这种结果. 所以我想问一问Python如果这样通过对象去访问类的属性(尽管是一种不规范的写法)究竟后台发生了什么. 是对象从类中将属性复制过来了么?

miao_mi

忘记贴程序执行结果了 :
Class_A.test =  a0
object_A.test =  a0
====================================
Class_A.test =  a1
object_A.test =  a1
====================================
Class_A.test =  a1
object_A.test =  a2
====================================
Class_A.test =  a3
object_A.test =  a2
====================================