Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
append() and extend() in Python
The append() and extend() functions are used with the python list to increase its number of elements. But the two have different behaviors as shown below.
append()
Syntax: list_name.append(‘value’) It takes only one argument.
This function appends the incoming element to the end of the list as a single new element. Even if the incoming element is itself a list, it will increase the count of the original list by only one.
Example
list = ['Mon', 'Tue', 'Wed' ]
print("Existing list\n",list)
# Append an element
list.append('Thu')
print("Appended one element: ",list)
# Append a list
list.append(['Fri','Sat'])
print("Appended a list: ",list)Output
Running the above code gives us the following result −
Existing list ['Mon', 'Tue', 'Wed'] Appended one element: ['Mon', 'Tue', 'Wed', 'Thu'] Appended a list: ['Mon', 'Tue', 'Wed', 'Thu', ['Fri', 'Sat']]
extend()
Extend adds each element to the list as an individual element. The new length of the list is incremented by the number of elements added.
Syntax: list_name.extend(‘value’) It takes only one argument.
Example
list = ['Mon', 'Tue', 'Wed' ]
print("Existing list\n",list)
# Extend an element
list.extend("Thu")
print("Extended one element: ",list)
# Extend a list
list.extend(['Fri','Sat'])
print("Extended a list: ",list)Output
Running the above code gives us the following result −
['Mon', 'Tue', 'Wed'] Extended one element: ['Mon', 'Tue', 'Wed', 'T', 'h', 'u'] Extended a list: ['Mon', 'Tue', 'Wed', 'T', 'h', 'u', 'Fri', 'Sat']
Updated on: 07-Aug-2019
1K+ Views
Advertisements