List in Python

In this tutorial, we will learn about the List in Python. Its types, and how to use them with the help of examples.

List is use to store the group of values. A list can be compose by storing a sequence of different type of values separated by commas. List is mutable object so we can do the manipulations. A list is enclose between square [] brackets. In list insertion order is preserve it means in which order we insert element same order output is print. A List duplicate objects are allowed. The list contains forward indexing & backward indexing.

The Creates a Lists Python

# Creating a List  
List = []  
print(List)  
     
# Creating a list of strings
List = ['Basic Engineer', 'Student'] 
print(List)  
     
# Creating a Multi-Dimensional List  
List = [['Basic', 'Engineer'], ['Hello Student']]  
print(List)

Example of lists in python

Let’s run the code

Accessing Elements From The List

# single-Dimensional List

List1 = ['Basic', 'Engineer', 'Student']
print("single-demensional list")
print(List1[0])
print(List1[2])

# Multi-Dimensional List

List2 = [['Basic', 'Engineer', 'Student'], ['Hello','Student']]
print("Multi-Dimensional list")
print(List2[0][2])
print(List2[1][1])

# negative list
List3 = [1, 2, 'Basic', 4, 'Engineer', 6, 'Student']
print("negative")
print(List3[-2])
print(List3[-7])

Accessing elements from the List

Let’s run the code

Python Lists Operations

• Repetition
  • Symbol of Repetition is a *
• Concatenation
  • Symbol of Concatenation +
• Length
• Iteration
• Membership

The Example of Python Lists Operations

# repetition    
list1 = [2, 4, 6, 8, 10, 12, 14]    
a = list1 * 2  
print(a)

# concatenation   
list2 = [2, 4, 6, 8, 10, 12, 14] 
list3 = [3, 6, 9, 12, 15, 18, 21]   
a = list2 + list3  
print(a)

# lenght    
list4 = [2, 4, 6, 8, 10, 12, 14]    
len(list4) 

# iterating 
list5 = [2, 4, 6]  
for i in list5:   
    print(i) 

# membership   
list6 = [2, 4, 6, 8, 10, 12, 14]
print(6 in list6)  
print(7 in list6)  
print(10 in list6)      

Example of Python Lists Operations

Let’s run the code

Method of Lists in Python

Slicing of Python Lists

It is possible to access a section of items from the list using the slicing operator :

Syntax

list_varible(start:stop:step) 
Where,
The start denotes the starting index position of the list.
The stop denotes the last index position of the list.
The step is use to skip the nth element within a start:stop   

Syntax of Slicing of Python Lists

A Example of Slicing of Python Lists

# slicing

list7 = ['b','a','s','i','c','e','n','g','i','n','e','e','r', 1,2,3]
print(list7[8:15])
print(list7[9:])
print(list7[:])

Example of Slicing of Python Lists

Let’s run the code

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