Python - 列表(list) 的 详解 及 代码

列表(list) 的 详解 及 代码

本文地址: http://blog.csdn.net/caroline_wendy/article/details/17290001

列表(list)是存储项目的数据结构, 包含很多项, 使用方括号("[]")进行存储;

列表长度,len()函数;

列表末尾增加一项,append()函数;

列表排序,sort()函数;

使用下标索引, 获得或改变一个值;

使用del方法, 删除一个元素;

其他方法参见Python手册;

代码如下:

# -*- coding: utf-8 -*-#====================#File: abop.py#Author: Wendy#Date: 2013-12-03#====================#eclipse pydev, python3.3shoplist = ['apple', 'mango', 'carrot', 'banana']print('I have', len(shoplist), 'items to purchase') #求列表的长度print('These items are:', end=' ') #end表示不是换行, 最后结束的是' 'for item in shoplist:    print(item, end=' ')print('\nI also have to buy rice.')shoplist.append('rice')print('My shopping list is now', shoplist) #打印列表[]print('I will sort my list now')shoplist.sort() #首字母排序print('Sorted shopping list is', shoplist)print('The first item I will buy is', shoplist[0])olditem = shoplist[0]del shoplist[0] #删除首元素print('I bought the', olditem)print('My shopping list is now', shoplist) #打印剩下的列表

输出:

I have 4 items to purchaseThese items are:apple mango carrot banana I also have to buy rice.My shopping list is now ['apple', 'mango', 'carrot', 'banana', 'rice']I will sort my list nowSorted shopping list is ['apple', 'banana', 'carrot', 'mango', 'rice']The first item I will buy is appleI bought the appleMy shopping list is now ['banana', 'carrot', 'mango', 'rice']