Python List base operations

Python list basic operations

Remember a word, called Gu head regardless of the tail

Let's start by defining a list

name = ["Jixuege", "Dajiba", "Boduoye", "Cangjinkong", "Youtianai"]

Next, we'll do a series of operations on this list.

1. Slicing

Take the first and second of the values

Print (name[0],name[1]) results Jixuege Dajiba

Description

The above 0 and 1 refer to the small mark, from left to right in order from 0 onwards to 4

Print an interval

name = ["Jixuege", "Dajiba", "Boduoye", "Cangjinkong", "Youtianai"]print (Name[:2]) print results [' jixuege ', ' Dajiba ']

Print the last one

name = ["Jixuege", "Dajiba", "Boduoye", "Cangjinkong", "Youtianai"]print (Name[-1]) print results Youtianai

2. Append

For example, I want to add a person in.

name = ["Jixuege", "Dajiba", "Boduoye", "Cangjinkong", "Youtianai"]name.append ("Xiha") print (name) results [' Jixuege ', ' Xitong ', ' Dajiba ', ' Youhua ', ' Boduoye ', ' cangjinkong ', ' Youtianai ', ' Xiha '

This will be appended to the end.

Another is inserting insert

name = ["Jixuege", "Dajiba", "Boduoye", "Cangjinkong", "Youtianai"]name.insert (2, "Youhua") print (name) results [' Jixuege ', ' Dajiba ', ' Youhua ', ' Boduoye ', ' cangjinkong ', ' Youtianai ']

3. Modification

Direct modification can

name = ["Jixuege", "Dajiba", "Boduoye", "Cangjinkong", "Youtianai"]name[2]= "wuming" Print (name) results [' Jixuege ', ' Dajiba ', ' wuming ', ' cangjinkong ', ' Youtianai ']

4. Delete

Direct emptying

name = ["Jixuege", "Dajiba", "Boduoye", "Cangjinkong", "Youtianai"]name.clear () print (name) results []

Delete the specified element

name = ["Jixuege", "Dajiba", "Boduoye", "Cangjinkong", "Youtianai"]name.remove ("Jixuege") print (name) results [' Dajiba ', ' Boduoye ', ' cangjinkong ', ' Youtianai ']

Delete the specified subscript

name = ["Jixuege", "Dajiba", "Boduoye", "Cangjinkong", "Youtianai"]del name[2]print (name) print results [' jixuege ', ' Dajiba ', ' Cangjinkong ', ' Youtianai ']

Do not specify subscript to delete the last

name = ["Jixuege", "Dajiba", "Boduoye", "Cangjinkong", "Youtianai"]name.pop () print (name) results [' Jixuege ', ' Dajiba ', ' Boduoye ', ' Cangjinkong ']

Specify subscript

name = ["Jixuege", "Dajiba", "Boduoye", "Cangjinkong", "Youtianai"]name.pop (1) print (name) results [' Jixuege ', ' Boduoye ', ' Cangjinkong ', ' Youtianai ']

Python List base operations