Python list knowledge is hot in recent years, and there are detailed examples of deleting and adding list elements.

Sequence is the most basic data structure in Python. There are 6 built-in sequence types, but the most common is Python list. List is the most commonly used Python data type. , which can appear as a comma-separated value within square brackets. The data items of list do not need to be of the same type to create a list, as long as the different data items separated by commas are enclosed in square brackets. It looks like this:

ist1 = ['physics', 'chemistry', 1997, 2000]
list2 = [1, 2, 3, 4, 5 ]
list3 = ["a", "b", "c", "d"]

Like string indexing, list indexing starts at 0. Lists can be intercepted, combined, etc.

How to make Pythonadd listelements?

You can use the append() method to add list items, as shown below:

#!/usr/bin/python
# -*- coding: UTF-8 -*-
list = []          ## 空列表
list.append('Google')   ## 使用 
append() 添加元素
list.append('tomorin')
print list

The output result of the above example:

['Google', 'tomorin']

Now that we knowPythonAddlistelements, we must also masterPythonDelete the listElements

Use the del statement to delete the elements of the list, as shown in the following example:

#!/usr/bin/python
 list1 = ['physics', 'chemistry', 1997, 2000]
 print list1
 del list1[2]
 print "After deleting value at index 2 : "
 print list1

The output result of the above example:
['physics ', 'chemistry', 1997, 2000]

After deleting value at index 2 :

['physics', 'chemistry', 2000]

After-class knowledge expansion,

What is the difference between lists and tuples in Python? Understand the similarities and differences between tuples and lists in one article

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