List operations for the Python Getting Started tutorial

Python list operation--Increase

Append: Append a piece of data to the end of the list

name = ["Zhangsan", "Xiongda", "Lisi"]name.append ("Wangwu") Print name output: [' Zhangsan ', ' Xiongda ', ' Lisi ', ' Wangwu ']

Insert : Inserts a single piece of data at the specified location

name = ["Zhangsan", "Xiongda", "Lisi"]name.insert (1, "Wangwu")    #在下标为1的位置插入一条数据 "Wangwu" Print name output: [' Zhangsan ' , ' Wangwu ', ' Xiongda ', ' Lisi ']

Python list operation--delete

name = ["Zhangsan", "Xiongda", "Lisi"]name.remove ("Lisi")    #删除指定的数据print name output: [' Zhangsan ', ' Xiongda ']

name = ["Zhangsan", "Xiongda", "Lisi"]del name[0]    #删掉下标为0的一条数据print name output: [' Xiongda ', ' Lisi ']

name = ["Zhangsan", "Xiongda", "Lisi"]name.pop ()    #删除最后一条数据print name output: [' Zhangsan ', ' Xiongda ']

if a parameter is brought into the pop (), the effect is the same as the Del

Name.pop (1) = = del Name[1]

Python list operation--Change

name = ["Zhangsan", "Xiongda", "Lisi"]name[1] = "Wangwu" Print name output: [' Zhangsan ', ' Wangwu ', ' Lisi ']

Python list operations-check

name = ["Zhangsan", "Xiongda", "Lisi", "Wangwu"]print (name[1])     #直接取出下标为1的数据输出结果: Xiongda

name = ["Zhangsan", "Xiongda", "Lisi", "Wangwu"]print (Name[0:2])   #取出从下标0到下标1的数据, excluding 2 (Gu Tou regardless of tail) output: [' Zhangsan ', ' Xiongda ']

When the current is marked as a negative number, the right start takes

name = ["Zhangsan", "Xiongda", "Lisi", "Wangwu"]print (name[-1])     #直接取出下标为1的数据输出结果: Wangwu

name = ["Zhangsan", "Xiongda", "Lisi", "Wangwu"]print (name[-3:-1])   #从倒数第三个开始取, take the second-to-last, because it does not include the 1 output: [' Xiongda ', ' Lisi ']

name = ["Zhangsan", "Xiongda", "Lisi", "Wangwu"]print (name[-3:])   #从倒数第三个开始取, take the first output of the countdown: [' Xiongda ', ' Lisi ', ' Wangwu '] Similarly from yesterday to take the time name[0:3] = = Name[:3]

List Other actions:

name = ["Zhangsan", "Xiongda", "Lisi", "Wangwu", "Lisi"]name.count ("Lisi")  #统计Lisi出现的次数name. Clear ()         # Empties the data name.reverse ()       #反转列表name. Sort ()           forward sort name2 = ["1", "2"]name.extend (name2)  #两个数组合并, name2 on the back