List slicing operations in Python

1a=['Zhao','Qian','Sun','Li','Zhou',"']2 3 #Change and delete4 #check section []5 Print(a[1:])#take the last6 Print(A[1:-1])#take the second-lowest value7 Print(A[1:-1:1])#from left to right one to fetch8 Print(A[1::2])#take it from left to right.9 Print(a[3::-1])TenB=a[3::-1] One Print(b)#[' Sanpang ', ' Xiaohu ', ' jinxin ', ' Wuchao '] A Print(a[-2::-1]) - Print(A[1:-1:-2])

Results:

[' Qian ', ' sun ', ' Li ', ' Zhou ', ' Wu ']    #5 [' Qian ', ' sun ', ' Li ', ' Zhou '] #6 [' Qian ', ' sun ', ' Li ', ' Zhou '] #7 [' Qian ', ' Li ', ' Wu '] #8 [' Li ', ' Sun '　　　　　　　　　　　　　　　　　　　　　　, ' Qian ', ' Zhao '] #9 [' Li ', ' Sun ', ' Qian ', ' Zhao '] #11 [' Zhou ', ' Li ', ' Sun ', ' Qian ', ' Zhao '] #12 [] #13

　　

1a=['Zhao','Qian','Sun','Li','Zhou','Wu']2 3 #Add append Insert4 5A.append ('Xuepeng')#default plug to last position6 Print(a)7A.insert (1,'Xuepeng')#inserting data into any location8 Print(a)

Results:

['Zhao','Qian','Sun','Li','Zhou','Wu','Xuepeng']['Zhao','Xuepeng','Qian','Sun','Li','Zhou','Wu','Xuepeng']

1a=['Zhao','Qian','Sun','Li','Zhou','Wu']2 #Modify3 #4a[1]='Haidilao'5 Print(a)6a[1:3]=['a','b']7 Print(a)

Results

1['Zhao','Haidilao','Sun','Li','Zhou','Wu']2['Zhao','a','b','Li','Zhou','Wu']

1 #Remove the Remove pop del2a=['Zhao','Qian','Sun','Li','Zhou','Wu']3 A.remove (a[0])4 Print(a)5B=a.pop (1)6 Print(a)7 Print(b)8 delA[0]9 Print(a)

Results:

1['Qian','Sun','Li','Zhou','Wu']2['Qian','Li','Zhou','Wu']3 Sun4['Li','Zhou','Wu']

1 #Count: Count the number of occurrences of an element2t=[' to',' be','or',' not',' to',' be'].count (' to')3 Print(t)4 5 #Extend6A = [1, 2, 3]7b = [4, 5, 6]8 A.extend (b)9 Print(a)Ten Print(b)

1 2

2 [1, 2, 3, 4, 5, 6]

3 [4, 5, 6]

Summarize:

1 list, tuple2 Check3 index (subscript), all starting from 04 slices5 . Count checks the number of occurrences of an element6 . Index to find its corresponding location according to the content7             "Haidilao GE" incha8 Increase9 a.append () AppendTenA.insert (Index,"content") One a.extend Extension A  - Modify -A[index] ="the new value" theA[start:end] =[A,b,c] -  - Delete -Remove"content") + Pop (index) - del A, del A[index] + a.clear () empty A  at Sort - sort () -Reverse ()

List slicing operations in Python