List Usage Big Summary

The list is a collection in Python, and the elements in the collection can be any data type, with the following usage:

Note: The following list of elements are in the case of a string, if the number or Boolean value is not added '

1> Building a list

Set name = [' Element 1 ', ' element 2 ', ' element 3 ', ...]

Example classmates = [' Hi ', ' hallo ', ' yellow ']

2> View a list

Enter the name of the collection directly

Example classmates

3> the length of a list, which has several elements

Len (collection name)

Example Len (classmates)

4> viewing elements in a list at a specific location

collection name [number]

Example Classmates[0] Note: The numbers here are the same as the C language starting with the 0 record

Python also supports reverse view

collection name [-number]

Example Classmates[-1]

5> adds new elements to the list at the end

Collection name. Append (' new element ')

Example Classmates.append (' Hola ')

6> inserting a new element at a specified position

Collection name. Insert (position, ' new element ')

Example Classmates.insert (1. ' Wow ')

7> Delete last Element

Collection name. Pop ()

Example Classmates.pop ()

8> delete the specified position element

Collection name. Pop (location)

Example Classmates.pop (1)

9> replacing the specified position element

collection name [position] = ' new element '

Example classmates[1] = ' haha '

10> contains another list in a list

Set name 1 = [' element 1 ', ' element 2 ', [' element 1 ', ' Element 2 '], ' element 3 ']

Example s = [' lala ', ' Heihei ', [' Xixi ', ' AA '], ' Lulu ']

11> to view an element of another list in a list

Collection name 1[location 1][position 2] Note: Position 1 must be the location of the included list, position 2 is also starting from 0 record

Example S[2][0]

List Usage Big Summary