EDUCBA

EDUCBA

MENUMENU
  • Free Tutorials
  • Free Courses
  • Certification Courses
  • 600+ Courses All in One Bundle
  • Login

Python Extend

By Priya PedamkarPriya Pedamkar

Home » Software Development » Software Development Tutorials » Python Tutorial » Python Extend

python extend

Introduction to Python Extend

Python extends is a great feature in python. It’s a keyword as well as a method also. We can use python extend to extend any class and its features into existing code. It is also called inheritance in the object-oriented paradigm. Extend is also an inbuilt method in python that can be used with a list or array to extend its items. It is almost a similar append method to the list.

When we use the extend method for array, it will take two arrays and append another array at the end of the first array. Append also works in a similar way, but it creates a nested array in the case of append, while the extend method does not create a nested array; it adds elements of the second array in the first array.

Start Your Free Software Development Course

Web development, programming languages, Software testing & others

Syntax:

array_one.extend(array_two)

Examples of Python Extend

Examples of python extend are:

Example #1 – Extending an Array

Code:

import array as arr
arr1 = arr.array('i', [1,2,3,4])
arr2 = arr.array('i', [5,6,7])
arr1.extend(arr2)
print(arr1)

Output:

Python Extend-1.1

In the above program, we have imported the array module, and we have given an alias name as ‘arr’ to it. We created two array arr1, arr2. These are of an integer type of array. Then we have used the extend method. We are using arr1 as the main array because we want to extend arr1 with elements of arr2. We have passed both the array and then in an output; you can see that we have elements of both the arrays.

Example #2 – Extending a List

Code:

a = [1,2,3,4,5] b = [6,7] a.extend(b)
print(a)

Output:

Python Extend-1.2

In the above program, we have created two lists, a and b. Both the list have an integer type of elements. Then we are extending list ‘a’ with the elements of list ‘b’. In the output, you can see all the elements of list b are extending into list a.

Example #3

Code:

a = [2010,2011,2012] b = ['john','doe',2013] a.extend(b)
print(a)

Output:

Output-1.3

In the above program, you can see that we have created the two lists; in the second list, we have added both integer and string values. The Extend method works well with both integer and string elements in the same list. As you can see in the output first list is extended.

Popular Course in this category
Python Training Program (36 Courses, 13+ Projects)36 Online Courses | 13 Hands-on Projects | 189+ Hours | Verifiable Certificate of Completion | Lifetime Access
4.8 (8,943 ratings)
Course Price

View Course

Related Courses
Programming Languages Training (41 Courses, 13+ Projects, 4 Quizzes)Angular JS Training Program (9 Courses, 7 Projects)

Extend method only works if the items passed are iterable. Iterable means it can be looped. If the list is having a single element, then also it is iterable. But we have tried to pass the value directly inside the extend method; then, it will generate errors.

Example #4

Code:

a = [2010,2011,2012] a.extend(5)
print(a)

Output:

Output-1.4

As you can see, we have passed value instead of a list in the extend method, and it has returned an error “object is not iterable”. The value we have passed is an integer, but if we have passed a string value, then extend method will work fine because the string is a collection of characters.

Example #5

Code:

a = [2010,2011,2012] a.extend("John")
print(a)

Output:

Output-1.5

As you can see in the above example, we have passed a string value instead of a list, but still, it works. Extend method treats string value as a collection of characters, and they are iterable. So we can say that strings are iterable. The output might not be as we wanted as it has separated every character of the string. But we have executed the above using the append method then we will get the desired result. The append method won’t separate each string.

Conclusion

Python extends feature is a very useful method when we already have an array or list, and we want to add more elements inside it. With the extend method, we can easily do it without doing any kind of element and inserting element one by one. It will add all the elements in one go.

Recommended Articles

This is a guide to Python Extend. Here we discuss the Introduction of python extend along with different examples and its code implementation. you may also have a look at the following articles to learn more –

  1. Python list remove()
  2. Multiple Inheritance in Python
  3. Python Features
  4. Python Reverse List

Python Training Program (36 Courses, 13+ Projects)

36 Online Courses

13 Hands-on Projects

189+ Hours

Verifiable Certificate of Completion

Lifetime Access

Learn More

0 Shares
Share
Tweet
Share
Primary Sidebar
Python Tutorial
  • Function
    • Python Built-in Functions
    • Math Functions in Python
    • Python String Functions
    • Trigonometric Functions in Python
    • Python Input Function
    • Python Input String
    • Python String Operations
    • Python String Contains
    • Python Stream
    • Python Multiline String
    • Python Regex
    • Python Regex Tester
    • Python regex replace
    • Python File Methods
    • Python Import CSV
    • Python Read CSV File
    • Python write CSV file
    • Python Delete File
    • Python File readline
    • Python if main
    • Python Main Method
    • List Method in Python
    • Python List Length
    • Python List extend
    • Recursive Function in Python
    • Copy List in Python
    • Python Range Function
    • Python Substring
    • Python list remove()
    • Python List Index
    • Python Set Function
    • Python len Function
    • Python eval()
    • Python Counter
    • ord Function in Python
    • strip Function in Python
    • Split Function in Python
    • Python Round Function
    • Python Map Function
    • Python String Join
    • Python format() Function
    • Python Contextlib
    • Python Compare Strings
    • Python Return Value
    • Python List count
    • Filter in Python
    • Python Slice String
    • Python Absolute Value
    • Python Trim String
    • Python Type Function
    • Lowercase in Python
    • Python xrange
    • Python yield
    • Python Find String
    • Max Function in Python
    • Python Power Function
    • pop() in Python
    • Python argparse
    • Python Pickle
    • Python Zip Function
    • Python Split String
    • super() in Python
    • Python Extend
    • Python String Replace
    • Python PEP8
    • Python Filter Function
    • Python if then else
    • Lambda in Python
    • Python BeautifulSoup
    • Python Sleep
    • Python Function Generator
    • Python @classmethod decorator
    • Python Endswith
    • Python BufferedReader
    • Python Async
    • Python Parser
    • Python SystemExit
    • Python pip
    • Python kwargs
  • Basics Part I
    • Introduction To Python
    • What Is Python
    • Careers in Python
    • Advantages of Python
    • Uses of Python
    • Python Features
    • Python Fast And python psyco
    • Python ImportError
    • Benefits and Limitations of Using Python
    • What can I do with?Python
    • Is Python a scripting language
    • Is Python Object Oriented
    • Is Python Open Source
    • Python Socket Programming
    • Useful Tips on Python Programming
    • Python You Should Be Using It
    • Python Web Development
    • Python Programming Beginners Tutorails
    • Practical Python Programming for Non-Engineers
    • Python Programming for the Absolute Beginner
    • Versions of?Python
  • Basic Part II
    • Comments in Python
    • Finally in Python
    • Python Multiline Comment
    • Python Data Types
    • Python Variables
    • Python Variable Types
    • Python Global Variable
    • Python Variable Scope
    • Python Private Variables
    • Python Default Arguments
    • Python Command-line Arguments
    • Indentation in Python
    • Object in Python
    • Flask in Python
    • Python Keywords
    • Python Literals
    • Pointers in Python
    • Iterators in Python
    • Python User Input
    • Python Enumerate
    • Python Commands
    • Type Casting in Python
    • Python Identifiers
    • Python Constants
    • What is NumPy in Python?
    • Cheat Sheet Python
  • Frameworks
    • Python Frameworks
    • Python Compilers
    • Python Editors
    • Best Compiler for Python
    • Python IDE for Windows
    • Python IDE on Linux
  • Installation
    • How To Install Python
    • Install Python on Linux
    • Install Python on Windows
    • Install Anaconda Python
  • Operator
    • Python Operators
    • Arithmetic Operators in Python
    • Python Comparison Operators
    • Logical Operators in Python
    • Assignment Operators in Python
    • Unary Operators in Python
    • String Operators in Python
    • Boolean Operators in Python
    • Identity Operators in Python
    • Python Bitwise Operator
    • Python Remainder Operator
    • Python Modulus Operator
  • Control Statement
    • Conditional Statements in Python
    • Control Statements in Python
    • If Condition in Python
    • If Statement in Python
    • If Else Statement in Python
    • else if Statement in Python
    • Nested IF Statement in Python
    • Break Statement in Python
    • Python Switch Statement
  • Loops
    • Loops in Python
    • For Loop in Python
    • While Loop in Python
    • Do While Loop in Python
    • Python Nested Loops
    • Python Infinite Loop
    • Python Event Loop
  • Sorting
    • Sorting in Python
    • Sorting Algorithms in Python
    • Bubble Sort in Python
    • Merge Sort in Python
    • Heap Sort in Python
    • Quick Sort in Python
    • Python Sorted Function
    • Sort string in Python
  • Array
    • Arrays in Python
    • 2D Arrays In Python
    • 3d Arrays in Python
    • Multidimensional Array in Python
    • Python Array Functions
    • String Array in Python
    • Python Sort Array
    • Python Array Length
  • Inheritance
    • Inheritance in Python
    • Single Inheritance in Python
    • Multiple Inheritance in Python
    • Interface in Python
  • Exception
    • Python Exception Handling
    • Custom Exception in Python
    • Indentation Error in Python
    • Python IOError
    • Python EOFError
    • Python NotImplementedError
    • Python TypeError
    • Python ValueError
    • Python AssertionError
    • Python Unicode Error
    • Python NameError
    • Python StopIteration
    • Python OverflowError
    • Python KeyboardInterrupt
  • Advanced
    • Scope in Python
    • Python Collections
    • Constructor in Python
    • Destructor in Python
    • Python Overloading
    • Overriding in Python
    • Function Overloading in Python
    • Method Overloading in Python
    • Operator Overloading in Python
    • Method Overriding in Python
    • Encapsulation in Python
    • Static Method in Python
    • Assert in Python
    • Python References
    • Python Virtualenv
    • Python mkdir
    • Logistic Regression in Python
    • Dictionary in Python
    • Regular Expression in Python
    • Python Import Module
    • Python OS Module
    • Python Sys Module
    • Python Generators
    • Abstract Class in Python
    • Python File Operations
    • Sequences in Python
    • Stack in Python
    • Queue in Python
    • Tuples in Python
    • Python Magic Method
    • Python Sets
    • Python Set Methods
    • Priority Queues in Python
    • Python Create Directory
    • Reverse Engineering with Python
    • String Formatting in Python
    • Python isinstance
    • String Length Python
    • Python Concurrency
    • Python List
    • Python Initialize List
    • Python Unique List
    • Python Sort List
    • Python Reverse List
    • Python Empty List
    • List Comprehensions Python
    • List Operations in Python
    • Python Repository
    • Python Database Connection
    • Python SQLite
    • Python SQLite Create Database
    • Send Mail in Python
    • Bash Scripting and Python
    • Violent Python Book
    • NLP in Python
    • Matplotlib In Python
    • Gray Hat Python: Security
    • Python Subprocess
    • Python Threading Timer
    • Python Threadpool
    • Python Statistics Module
    • How to Call a Function in Python?
    • Python Curl
    • JSON in Python
    • Python json.dumps
    • Python Turtle
    • Python testing framework
    • Python Unit Test
    • pass Keyword in Python
    • Tokenization in Python
    • Random Module in Python
    • Python Multiprocessing
    • Python getattr
    • Collection Module in Python
    • Print Statement in Python
    • Python Countdown Timer
    • Python Context Manager
    • File Handling in Python
    • Python Event Handler
    • Python Print Table
    • Python Docstring
    • Python Dictionary Keys
    • Python Iterator Dictionary
    • Python Class Attributes
    • Python Dictionary Methods
    • Namedtuple Python
    • Namedtuple Python
    • Namedtuple Python
    • Python Class Constants
    • Python Validation
    • Python Switch Case
    • Python Rest Server
    • Python Yield vs Return
    • Python Pickle vs JSON
    • Seaborn Histogram
  • Tkinter
    • Tkinter Widgets
    • Python Tkinter Button
    • Python Tkinter Canvas
    • Tkinter Frame
    • Tkinter LabelFrame
    • Python Tkinter Label
    • Tkinter Scrollbar
    • Tkinter Listbox
    • Tkinter Spinbox
    • Tkinter Checkbutton
    • Tkinter Menu
    • Tkinter Menubutton
    • Tkinter OptionMenu
    • Tkinter Messagebox
    • Tkinter Grid
    • Python Tkinter Entry
    • Tkinter after
    • Tkinter Colors
    • Tkinter Font
    • Tkinter PhotoImage
    • Tkinter TreeView
    • Tkinter Notebook
    • Tkinter Bind
    • Tkinter Icon
    • Tkinter Window Size
    • Tkinter Color Chart
    • Tkinter Slider
    • Tkinter Calculator
    • Tkinter geometry
    • Tkinter image
    • Tkinter input box
    • Tkinter mainloop
  • Programs
    • Patterns in Python
    • Star Patterns in Python
    • Swapping in Python
    • Factorial in Python
    • Fibonacci Series in Python
    • Reverse Number in Python
    • Palindrome in Python
    • Random Number Generator in Python
    • Prime Numbers in Python
    • Armstrong Number in Python
    • Strong Number in Python
    • Leap Year Program in Python
    • Square Root in Python
    • Python Reverse String
    • Python Object to String
    • Python Object to JSON
    • Python Classmethod vs Staticmethod
  • Python 3
    • Python 3 Commands
    • Python 3 cheat sheet
  • Interview Question
    • Python Interview Questions And Answers

Related Courses

Python Certification Course

Programming Languages Courses

Angular JS Certification Training

Footer
About Us
  • Blog
  • Who is EDUCBA?
  • Sign Up
  • Corporate Training
  • Certificate from Top Institutions
  • Contact Us
  • Verifiable Certificate
  • Reviews
  • Terms and Conditions
  • Privacy Policy
  •  
Apps
  • iPhone & iPad
  • Android
Resources
  • Free Courses
  • Java Tutorials
  • Python Tutorials
  • All Tutorials
Certification Courses
  • All Courses
  • Software Development Course - All in One Bundle
  • Become a Python Developer
  • Java Course
  • Become a Selenium Automation Tester
  • Become an IoT Developer
  • ASP.NET Course
  • VB.NET Course
  • PHP Course

© 2020 - EDUCBA. ALL RIGHTS RESERVED. THE CERTIFICATION NAMES ARE THE TRADEMARKS OF THEIR RESPECTIVE OWNERS.

EDUCBA Login

Forgot Password?

EDUCBA
Free Software Development Course

Web development, programming languages, Software testing & others

*Please provide your correct email id. Login details for this Free course will be emailed to you
Book Your One Instructor : One Learner Free Class

Let’s Get Started

This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy

EDUCBA

*Please provide your correct email id. Login details for this Free course will be emailed to you
EDUCBA
Free Software Development Course

Web development, programming languages, Software testing & others

*Please provide your correct email id. Login details for this Free course will be emailed to you

Special Offer - Python Training Program (36 Courses, 13+ Projects) Learn More