socket programming in python ?

[Humble]

Almost everyone know how socket programming works .. Its no different in python. The same pattern follows..

If you are writing a server side program. It should have:

1) Create a socket object
2) Bind it with the hostname and port
3) Start istening for the incoming connection
4) Sending data to client
5) Close the socket

Client side:
1) Create socket object
2) Connect to the server
3) Receive reply from the server..
4) close the socket

[1]

A quick demonstration of the above can be shown like :

#!/usr/bin/python

#You need to import socket module

import socket
import sys

#Create a socket object ..
sockObj = socket.socket()

# You can get IP address of any host by using below method
remote = socket.gethostbyname("www.yahoo.com")

# If you want to get your hostname , use below 
local = socket.gethostname()

# define a port to work with
myport= 54321

print ("Remote server :%s , Local :%s") %(remote, local)

try:
       # Binding the socket , you can use "local", remote  
#variables    stored above as first argument for the bind call 
	sockObj.bind(('127.0.0.1',myport))
 
# Let it listen!
	sockObj.listen(5)
except Exception as e:
	print "Error in operation :({0}): ({1})".format(e.errno, e.strerror) 

while True:
       # Accept client connection
   	client, addr = sockObj.accept() 
   	print 'Got connection from', addr
       # sending data to client
   	c.send('You are welcome and Thank you for connecting')
       # Then closing the socket
   	c.close()         


Client Program

#!/usr/bin/python

import socket
 # Create a socket object
clientSocket = socket.socket()        
host = socket.gethostname() 
port = 54321                

#Connecting to server program 

clientSocket.connect(("127.0.0.1", port))

#Receiving date from the server
print clientSocket.recv(1024)
#Close it 
clientSocket.close  
                   



Now, try to execute the server and client program:

In one terminal execute server.py and let it listen

In other terminal execute client program :
[hchiramm@humbles-lap sql-back]$ ./client.py 
You are welcome and Thank you for connecting

Let me know if you need further explanation.. 

[Author]

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