Python：’是’和’==’之间有什么区别？

Python: what difference between 'is' and '=='?

本问题已经有最佳答案，请猛点这里访问。

我正在尝试下一个代码：

1
2
3
4
5
6
7

x = 'asd'
y = 'asd'
z = input() #write here string 'asd'. For Python 2.x use raw_input()
x == y # True.
x is y # True.
x == z # True.
x is z # False.

为什么我们在最后一个表达中有错误？

相关讨论

(P)EDOCX1…0…语言检查EDOCX1 6 is EDOCX1 commercial 7 commercial IFF EDOCX1 niplication 8 commercial and EDOCX1 commercial 9.Are the same object(they are both stored in the same memory address).(p)(P)EDOCX1通用语10：平等检查，通常由魔法方法EDOCX1拼写11个音标-I.E.、EDOCX1音标12是EDOCX1音标7，如果EDOCX1音标14，音标14，音标7。(p)(P)In your case specifically，pyton optimizes the two hardcoded strings into the same object(since strings are immutable，there's no danger in that).既然EDOCX1的英文字母1会创造出一个在运行中的打击，它不可能做到优化，也不可能创造一个新的目标。(p)