[已解决]基础课后题

神秘的帅哥

>>>myteacher = '小甲鱼'
>>>yourteacher = myteacher
>>>yourteacher = '黑夜'
>>>print(myteacher)

和

[code]>>> myteacher = '小甲鱼'
>>> yourteacher = myteacher
>>> myteacher = '黑夜'
>>> print(yourteacher)

菜鸟求助为什么结果都会打印小甲鱼

最佳答案

月排行榜 / 总排行榜

jiong_jiong

2020-3-12 15:09:50

你这样理解，你的myteacher和yourteacher都是字符串上的标签。
myteacher = '小甲鱼'
>>> yourteacher = myteacher 到了这步的时候，“小甲鱼”的标签是yourteacher
>>> myteacher = '黑夜' //“黑夜”的标签是myteacher;
>>> print(yourteacher) //打印的是yourteacher指向的字符串。

>>>myteacher = '小甲鱼'
>>>yourteacher = myteacher
>>>yourteacher = '黑夜'
>>>yourteacher = myteacher //重新赋值
>>>print(myteacher)

这样就是你想要的答案了

跳转到最佳答案楼层

qiuyouzhi

第一个，myteacher根本没有动，动的只有yourteacher，所以打印小甲鱼
第二个，先将myteacher赋值为小甲鱼，再将yourteacher
赋值为myteacher（小甲鱼，相当于做了个备份），这时候把myteacher
改一下（这时备份没有动！），打印备份，就是小甲鱼

Hoiste

python中的变量名是变量的标签，变量名之间画等号的话两个变量名都是指向指而不是变量名指向变量名。如果我们改变其中一个变量名的值就是把标签贴到其他地方去了，另一个变量名还是原来值的标签。

jiong_jiong

你这样理解，你的myteacher和yourteacher都是字符串上的标签。
myteacher = '小甲鱼'
>>> yourteacher = myteacher 到了这步的时候，“小甲鱼”的标签是yourteacher
>>> myteacher = '黑夜' //“黑夜”的标签是myteacher;
>>> print(yourteacher) //打印的是yourteacher指向的字符串。

>>>myteacher = '小甲鱼'
>>>yourteacher = myteacher
>>>yourteacher = '黑夜'
>>>yourteacher = myteacher //重新赋值
>>>print(myteacher)

这样就是你想要的答案了

zltzlt

请见：https://fishc.com.cn/thread-159045-1-1.html