Skip to content
geeksforgeeks
  • Courses
    • DSA to Development
    • Get IBM Certification
    • Newly Launched!
      • Master Django Framework
      • Become AWS Certified
    • For Working Professionals
      • Interview 101: DSA & System Design
      • Data Science Training Program
      • JAVA Backend Development (Live)
      • DevOps Engineering (LIVE)
      • Data Structures & Algorithms in Python
    • For Students
      • Placement Preparation Course
      • Data Science (Live)
      • Data Structure & Algorithm-Self Paced (C++/JAVA)
      • Master Competitive Programming (Live)
      • Full Stack Development with React & Node JS (Live)
    • Full Stack Development
    • Data Science Program
    • All Courses
  • Tutorials
    • Data Structures & Algorithms
    • ML & Data Science
    • Interview Corner
    • Programming Languages
    • Web Development
    • CS Subjects
    • DevOps And Linux
    • School Learning
  • Practice
    • Build your AI Agent
    • GfG 160
    • Problem of the Day
    • Practice Coding Problems
    • GfG SDE Sheet
  • Contests
    • Accenture Hackathon (Ending Soon!)
    • GfG Weekly [Rated Contest]
    • Job-A-Thon Hiring Challenge
    • All Contests and Events
  • Python Tutorial
  • Interview Questions
  • Python Quiz
  • Python Glossary
  • Python Projects
  • Practice Python
  • Data Science With Python
  • Python Web Dev
  • DSA with Python
  • Python OOPs
Open In App
Next Article:
Python | Binding function in Tkinter
Next article icon

Python – Binding and Listening with Sockets

Last Updated : 01 Jun, 2022
Comments
Improve
Suggest changes
Like Article
Like
Report

Socket programming is a way of connecting two nodes on a network to communicate with each other. One socket(node) listens on a particular port at an IP, while other socket reaches out to the other to form a connection. The server forms the listener socket while the client reaches out to the server. Note: For more information, refer Socket Programming in Python

Binding and Listening with Sockets

A server has a bind() method which binds it to a specific IP and port so that it can listen to incoming requests on that IP and port. A server has a listen() method which puts the server into listen mode. This allows the server to listen to incoming connections. And last a server has an accept() and close() method. The accept method initiates a connection with the client and the close method closes the connection with the client.

 Example 

Python3

import socket
import sys
 
 
# specify Host and Port
HOST = ''
PORT = 5789
   
soc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  
try:
    # With the help of bind() function
    # binding host and port
    soc.bind((HOST, PORT))
      
except socket.error as message:
     
    # if any error occurs then with the
    # help of sys.exit() exit from the program
    print('Bind failed. Error Code : '
          + str(message[0]) + ' Message '
          + message[1])
    sys.exit()
     
# print if Socket binding operation completed   
print('Socket binding operation completed')
  
# With the help of listening () function
# starts listening
soc.listen(9)
  
conn, address = soc.accept()
# print the address of connection
print('Connected with ' + address[0] + ':'
      + str(address[1]))
                      
                      
                                                    
                       
                  
                  
 
  • First of all we import socket which is necessary.
  • Then we made a socket object and reserved a port on our pc.
  • After that we bound our server to the specified port. Passing an empty string means that the server can listen to incoming connections from other computers as well. If we would have passed 127.0.0.1 then it would have listened to only those calls made within the local computer.
  • After that we put the server into listen mode. 9 here means that 9 connections are kept waiting if the server is busy and if a 10th socket tries to connect then the connection is refused.
  
Now we need something with which a server can interact. We could tenet to the server like this just to know that our server is working. Type these commands in the terminal:
  
# start the server $ python server.py
  
Keep the above terminal open now open another terminal and type:
  
$ telnet localhost 12345
  
Output: python-socket-bind-and-listen-2 python-socket-bind-and-listen-2
   

                                                                                      

                                                                                
                                          
                                                                                  
                                                                  
                              
                                
                                                                            Next Article                                                                                                                                                            
                                          Python | Binding function in Tkinter                                      
                                  
                                                          
                          
                              
                                          
                                              
                                                  
                                                  
                                                      
author          
                        
          
                                                  
                                                  
                                                      vipinyadav15799                                                
                                                  
                                                  
              
              
  
                                            
                                                                                        
                                          
                                                                                            
                                                                                                                                                  
                                                                                                                            
                                      Improve                                                                        
                                                                        
                          
                          
                                                              
                                      
Article Tags : 
                                      
                                                            
  •                   Python              
    •               
  •                   Python-socket              
    •                                     
                                                                      
                                                                                          
                                      
Practice Tags : 
                                      
                                              
  • python
    •                                     
                                                                      
                                                      
                          
                                                                                                                                 
                                  
Similar Reads
                                  
                                      
  •                       
    Building A Weather CLI Using Python                      
                          
    Trying to know the weather is something that we all do, every day. But have you ever dreamed of making a tool on your own that can do the same? If yes, then this article is for you. In this article, we will look at a step-by-step guide on how to build a Weather CLI using OpenWeather API. What is Ope
                      
                      
                                                4 min read                  
                      
  •                       
    Telnet with ipaddress and port in Python                      
                          
    Telnet is a protocol that allows you to connect to a remote computer and execute commands. Python provides a built-in module called "telnetlib" that enables us to use Telnet in our code. What is Telnet in Python?Telnet clients let you connect to other Telnet Servers. You cannot connect to your own s
                      
                      
                                                3 min read                  
                      
  •                       
    What is Python? Its Uses and Applications                      
                          
    Python is a programming language that is interpreted, object-oriented, and considered to be high-level. What is Python? Python is one of the easiest yet most useful programming languages and is widely used in the software industry. People use Python for Competitive Programming, Web Development, and
                      
                      
                                                8 min read                  
                      
  •                       
    Learn to use Websockets with Django                      
                          
    Django Channels is an extension of the Django framework that allows for handling WebSockets, HTTP2, and other protocols. It integrates with Django’s existing ORM and works seamlessly alongside Django views. In this tutorial, we will create a small Django project that displays "GeeksforGeeks" on the
                      
                      
                                                4 min read                  
                      
  •                       
    Python | Binding function in Tkinter                      
                          
    Tkinter is a GUI (Graphical User Interface) module that is widely used in desktop applications. It comes along with the Python, but you can also install it externally with the help of pip command. It provides a variety of Widget classes and functions with the help of which one can make our GUI more
                      
                      
                                                3 min read                  
                      
  •                       
    Socket Programming with Multi-threading in Python                      
                          
    Prerequisite : Socket Programming in Python, Multi-threading in PythonSocket Programming-> It helps us to connect a client to a server. Client is message sender and receiver and server is just a listener that works on data sent by client.What is a Thread? A thread is a light-weight process that d
                      
                      
                                                3 min read                  
                      
  •                       
    Executing Shell Commands with Python                      
                          
    This article starts with a basic introduction to Python shell commands and why one should use them. It also describes the three primary ways to run Python shell commands. os.system()subprocess.run()subprocess.Popen() What is a shell in the os?In programming, the shell is a software interface for acc
                      
                      
                                                4 min read                  
                      
  •                       
    Socket Programming in Python                      
                          
    Socket programming is a way of connecting two nodes on a network to communicate with each other. One socket(node) listens on a particular port at an IP, while the other socket reaches out to the other to form a connection. The server forms the listener socket while the client reaches out to the serv
                      
                      
                                                6 min read                  
                      
  •                       
    Python requests - POST request with headers and body                      
                          
    HTTP headers let the client and the server pass additional information with an HTTP request or response. All the headers are case-insensitive, headers fields are separated by colon, key-value pairs in clear-text string format. Request with headersRequests do not change its behavior at all based on w
                      
                      
                                                4 min read                  
                      
  •                       
    Internet of Things with Python                      
                          
    The integration of Python into the Internet of Things (IoT) signifies a transformation in how we develop, implement, and scale IoT applications. Python's simplicity, versatility, and robust library ecosystem make it an excellent choice for IoT development, enabling everything from simple home automa
                      
                      
                                                9 min read                  
                      
                                 
                              
                                                                                
                                  
                                                                                                            
                              
                            
                              
                                                                                      
                                
                              
                                                                                    
                      
                  
              
                  
          
              
                  
                      
                                        
                   
                            
                                  
                              
                                  
              
          
              
                        
  	  	  	
  		
  					
  			
  			
  					
  	
    	  	
  		
  					
  			
  			
  			
  				
  	
  	  	        	  	
  		
  					
  			
  			    	  	
  		
  		   		
  	
  
                    
          
      
      
          
              
              
          
      
  
    
                        	
    
      
                
          
                    
              
                
                                  
                        
        
      
    
      
        
        
            
                                  geeksforgeeks-footer-logo                                
                    
                      
                                               
                                               
Corporate & Communications Address:
                                              
                        A-143, 7th Floor, Sovereign Corporate Tower, Sector- 136, Noida, Uttar Pradesh (201305)                    
                      
                    
                                               
                                                  
                          
Registered Address:
                          K 061, Tower K, Gulshan Vivante Apartment, Sector 137, Noida, Gautam Buddh Nagar, Uttar Pradesh, 201305                      
                      
                                        
                
                
                                            
                                                                
                                                                
                                                                
                                                                
                                    
                
                    GFG App on Play Store                    GFG App on App Store                
                
                  Advertise with us                
             
          
            
  • Company
  • About Us
  • Legal
  • Privacy Policy
  • In Media
  • Contact Us
  • Advertise with us
  • GFG Corporate Solution
  • Placement Training Program
  • Languages
  • Python
  • Java
  • C++
  • PHP
  • GoLang
  • SQL
  • R Language
  • Android Tutorial
  • Tutorials Archive
  • DSA
  • Data Structures
  • Algorithms
  • DSA for Beginners
  • Basic DSA Problems
  • DSA Roadmap
  • Top 100 DSA Interview Problems
  • DSA Roadmap by Sandeep Jain
  • All Cheat Sheets
  • Data Science & ML
  • Data Science With Python
  • Data Science For Beginner
  • Machine Learning
  • ML Maths
  • Data Visualisation
  • Pandas
  • NumPy
  • NLP
  • Deep Learning
  • Web Technologies
  • HTML
  • CSS
  • JavaScript
  • TypeScript
  • ReactJS
  • NextJS
  • Bootstrap
  • Web Design
  • Python Tutorial
  • Python Programming Examples
  • Python Projects
  • Python Tkinter
  • Python Web Scraping
  • OpenCV Tutorial
  • Python Interview Question
  • Django
  • Computer Science
  • Operating Systems
  • Computer Network
  • Database Management System
  • Software Engineering
  • Digital Logic Design
  • Engineering Maths
  • Software Development
  • Software Testing
  • DevOps
  • Git
  • Linux
  • AWS
  • Docker
  • Kubernetes
  • Azure
  • GCP
  • DevOps Roadmap
  • System Design
  • High Level Design
  • Low Level Design
  • UML Diagrams
  • Interview Guide
  • Design Patterns
  • OOAD
  • System Design Bootcamp
  • Interview Questions
  • Inteview Preparation
  • Competitive Programming
  • Top DS or Algo for CP
  • Company-Wise Recruitment Process
  • Company-Wise Preparation
  • Aptitude Preparation
  • Puzzles
  • School Subjects
  • Mathematics
  • Physics
  • Chemistry
  • Biology
  • Social Science
  • English Grammar
  • Commerce
  • World GK
  • GeeksforGeeks Videos
  • DSA
  • Python
  • Java
  • C++
  • Web Development
  • Data Science
  • CS Subjects
        
         
                              
            
                @GeeksforGeeks, Sanchhaya Education Private Limited, All rights reserved            
            
            
        
    
  
         
                We use cookies to ensure you have the best browsing experience on our website. By using our site, you          acknowledge that you have read and understood our          Cookie Policy &          Privacy Policy                      
        
     Lightbox       
                      
              
                  
                      
Improvement
                      
                                                
                  
                  
                      
                                          
                                                
                  
                  
                    
                      
                        
Suggest Changes
                        
Help us improve. Share your suggestions to enhance the article. Contribute your expertise and make a difference in the GeeksforGeeks portal.
                      
                      
                        geeksforgeeks-suggest-icon                      
                    
                    
                      
                        
Create Improvement
                        
Enhance the article with your expertise. Contribute to the GeeksforGeeks community and help create better learning resources for all.
                      
                      
                      geeksforgeeks-improvement-icon                      
                    
                    
                  
              
              
                                    
                    
                      
                                              
                      
Suggest Changes
                    
                    
                                              
                  
                  
                          
min 4 words, max Words Limit:1000
                          
                          
                                                    
                                
Thank You!
                                
Your suggestions are valuable to us.
                          
                  
                                     
                      
                                        
              
                        
                                                        
       
         
             
                 
What kind of Experience do you want to share?
                 
             
                          
                                      
                         
                     
                     
                         Interview Experiences                     
                                                       
                         
                     
                     
                         Admission Experiences                     
                                                       
                         
                     
                     
                         Career Journeys                     
                                                       
                         
                     
                     
                         Work Experiences                     
                                                       
                         
                     
                     
                         Campus Experiences                     
                                                       
                         
                     
                     
                         Competitive Exam Experiences