When you assign an object to a variable, Python copies the reference to the object.

In this case a and b refer to the same list.

If you want to copy the list (not just a reference to it), you can use the slice operator:

Making a slice of a creates a new list. in this case the slice contains all of the elements from the original list.

Another way to make a copy is the copy function from the copy module:

But is more idiomatic to use the slice operator.

from Thinking in Python

Copying lists的更多相关文章

  1. Copying Linked Lists with Random Pointers

    Copying Linked Lists with Random Pointers 两个方法:方法一: 1.不考虑随机指针的情况下复制链表: 2.在复制过程中建立一个以原链表节点地址为key,相应的复 ...

  2. [转]Unity: make your lists functional with ReorderableList

    原文地址:http://va.lent.in/unity-make-your-lists-functional-with-reorderablelist/ This article is reprod ...

  3. [LeetCode] Intersection of Two Linked Lists 求两个链表的交点

    Write a program to find the node at which the intersection of two singly linked lists begins. For ex ...

  4. [LeetCode] Merge k Sorted Lists 合并k个有序链表

    Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. 这 ...

  5. [LeetCode] Merge Two Sorted Lists 混合插入有序链表

    Merge two sorted linked lists and return it as a new list. The new list should be made by splicing t ...

  6. 21. Merge Two Sorted Lists —— Python

    题目: Merge two sorted linked lists and return it as a new list. The new list should be made by splici ...

  7. 【leetcode】Intersection of Two Linked Lists

    题目简述: Write a program to find the node at which the intersection of two singly linked lists begins. ...

  8. [LintCode] Intersection of Two Linked Lists 求两个链表的交点

    Write a program to find the node at which the intersection of two singly linked lists begins. Notice ...

  9. [LintCode] Merge Two Sorted Lists 混合插入有序链表

    Merge two sorted (ascending) linked lists and return it as a new sorted list. The new sorted list sh ...

随机推荐

  1. (hdu step 7.1.6)最大三角形(凸包的应用——在n个点中找到3个点,它们所形成的三角形面积最大)

    题目: 最大三角形 Time Limit: 5000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Sub ...

  2. Docker 命令行和后台參数

    Docker官方为了让用户高速了解Docker,提供了一个交互式教程,旨在帮助用户掌握Docker命令行的用法. Docker 命令行 以下对Docker的命令清单进行简单的介绍,具体内容在兴许章节具 ...

  3. SICP 习题 （1.41）解题总结

    SICP 习题1.41 看似和周边的题目没有关系,突然叫我们去定义一个叫double的过程,事实上这道题的核心还是高阶函数. 题目要求我们定义一个过程double,它以一个过程作为參数,这个作为參数的 ...

  4. 安卓更新Toast流程图

    今天照着书写了个程序为了理解更深刻特意画了一个流程图分享给大家 watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvc29uZ2p1bnlhbg==/font/5 ...

  5. 关于 折半查找 while 条件 < , <=

    int bin_search(int a[],int len,int key) { int low=0; int high=len-1; while(low<=high) //若为low< ...

  6. node18---Mongoose

    二.索引index 数据库中,根据一个字段的值,来寻找一个文档,是很常见的操作.比如根据学号来找一个学生. 这个学号,是唯一的,只要有学号,就能唯一确认一个学生的文档.学号这个属性,就非常适合建立索引 ...

  7. SpringBoot(三) SpringBoot中的日志配置

    SLF4J Spring Boot在所有内部日志中使用Commons Logging,但是默认配置也提供了对常用日志的支持,如:Java Util Logging,Log4J, Log4J2和Logb ...

  8. word2tex之类的问题

    首先就是这个word2tex一般是在word和tex文本互相转换的时候用的. 以前win7下用的chikrii忘了使用方法.. 之后再win10下用的excel2tex,但是转换时候总感觉不如word ...

  9. jQuery学习(二)——使用JQ完成页面定时弹出广告

    1.JQuery效果 2.步骤分析: 第一步:引入jQuery相关的文件 第二步:书写页面加载函数 第三步:在页面加载函数中,获取显示广告图片的元素. 第四步:设置定时操作(显示广告图片的函数) 第五 ...

  10. shell-1.shell概述、2.shell脚本执行方式

    目录