4. List of Python data types

Source: Internet
Author: User

List
List common actions
1. Index value

Name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']print (name_list[0]) print (name_list[-1])

2. List slices

#将列表中第一个到第二元素切片出来, form a sub-list name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']print (Name_list[1:3])

3, get the length of the list

Name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao '] #h获取长度print (len (name_list)) #输出所有的元素print (Name_list[0:len (name_ List)])

4. For loop print out all elements of the list

Name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']for i in Name_list:    print (i)

5. Delete list Specify location element

Name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' zhao '] #删除第一个元素name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']del name_ List[1]print (name_list) #删除第0个到第一个元素name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']del name_list[0:2]print (name_ List

List method

Name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao '] #获取列表的所有方法, including the built-in method print (dir (name_list)) #外部方法 [' Append ', ' Clear ', ' Copy ', ' Count ', ' extend ', ' index ', ' Insert ', ' pop ', ' remove ', ' reverse ', ' sort ']

Append

#在列表尾部追加元素name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']name_list.append (' hehe ') print (name_list)

Clear

#将列表中元素清空, form an empty list name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']name_list.clear () print (name_list)

Count

#统计列表中某一个元素出现的次数name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']num=name_list.count (' li ') print (num)

Extend

#将一个列表全部元素追加到另一个列表中name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' zhao ']num_list = [1,2,34,56,32]name_list.extend (num_ List) print (name_list)

Index

#h获取列表中某个元素的索引name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']print (name_list.index (' Wang '))

Insert

#在列表中某个位置插入一个元素name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']name_list.insert (3, ' good ') print (name_list) print ( Name_list.index (' good '))

Pop

#删除列表中最后一个元素, and you can assign the element as a string to a variable name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']a=name_list.pop () print (name_ List) print (a)

Remove

#移除列表中指定元素name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']name_list.remove (') ' Print (name_list)

Reverse

#将列表中所有元素翻转过来name_list = [' Wang ', ' Zhou ', ' Li ', ' Hu ', ' Wu ', ' Zhao ']name_list.reverse () print (name_list)

Sort

#列表元素排序num =[23,123,45,12,456,323,1,34]num.sort () print (num)

4, List of Python data types

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