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. npm API文档

    npm API文档 https://docs.npmjs.com/

  2. iOS-UIImage imageWithContentsOfFile 和 imageName 对照

    1.imageWithContentsOfFile NSString *imagePath = [NSString stringWithFormat:@"%@/%@",[[NSBu ...

  3. RAC IP 地址修改

    RAC 修改IP: 版本信息: REDHAT AS5 ORACLE 11G R2, 两个节点. 修改如下: 1.修改/etc/host(rac1,rac2) 192.168.3.205   rac-s ...

  4. javascript系列-class9.DOM(上)

    欢迎加入前端交流群交流知识获取视频资料:749539640 1.文档对象模型DOM(document Object Model)        所谓DOM就是以家族的形式描述HTML       节点 ...

  5. mfc进制转换

    ; CString str; m_edit1.GetWindowTextW(str); swscanf_s(str, _T("%d"), &num); _TCHAR str ...

  6. Core Java(二)

    二 .JAVA语言基础 1.注释,标识符,关键字  Comments         用于解释说明程序的文字 Java中注释分类格式 单行注释:格式: //注释文字                多行 ...

  7. （转载） Android RecyclerView 使用完全解析 体验艺术般的控件

    Android RecyclerView 使用完全解析 体验艺术般的控件 标签: Recyclerviewpager瀑布流 2015-04-16 09:07 721474人阅读 评论(458) 收藏  ...

  8. 微信小程序------开发测试

    一.注册小程序 注:微信小程序注册的邮箱不能被其他微信公众平台注册,未被微信开放平台注册,未被给人微信号绑定的微信号. 二.注册完小程序后,下载开发者工具 开发者工具的使用: 1.打开开发者工具:用已 ...

  9. IPv6第二层寻址，IPv6接口要求

    1. IPv6第二层寻址 IPV6地址以两种方式与第2层地址相关.第一种方式是IPV6独有的,提供了从第2层地址构建接口ID的机制.第二种方式对IPv4和IPV6都是一样的,提供了将一个IP组播地址映 ...

  10. map循环遍历

    data.map(function(item){ item.show = false; //将拿到的data循环给每一项添加show属性 });