Example of client and server socket in python.

socket_client.py

#!/usr/bin/python
import socket
import os, os.path

print "Connecting..."

if os.path.exists('./example.sock'):

    client = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
    client.connect('./example.sock')

    print "Ready"
    print "Ctrl-C to quit."
    print "Sending 'DONE' shuts down the server and quits"

    while True:
        try:
            x = raw_input('>')
            if x != "":
                print "SEND: ", x
                client.send(x)
                if x == "DONE":
                    print "Shutting down."
                    break
        except KeyboardInterrupt, k:
            print "Shutting down"

    client.close()
else:
    print "Couldn`t Connect!"

print "Done"

socket_server.py

#!/usr/bin/python
import socket
import os, os.path

#Set the file name
sockfile = "./example.sock"

#Verify if exists the sock file
if os.path.exists(sockfile):
    os.remove(sockfile)

#Print start msg
print "Start socket server, socket file: " + sockfile

#AF_UNIX and SOCK_STREAM are constants represent the protocol and socket type respectively
#http://docs.python.org/2/library/socket.html#socket.AF_UNIX
#http://docs.python.org/2/library/socket.html#socket.SOCK_STREAM
server = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)

#Bind to the socket file
#http://docs.python.org/2/library/socket.html#socket.socket.bind
server.bind(sockfile)

#Listen for connections, the param 5 specifies the maximum number of queued connections
#http://docs.python.org/2/library/socket.html#socket.socket.listen
server.listen(5)

print "Listening..."

while True:
    #Accept a connection
    #http://docs.python.org/2/library/socket.html#socket.socket.accept
    #conn = is a new socket object usable to send and receive data on the connection
    #addr = is the address bound to the socket *on the other* end of connection
    conn, addr = server.accept()

    print "new connection..."

    while True:
        #Receive data from socket
        #Return a string represent the data received
        #http://docs.python.org/2/library/socket.html#socket.socket.recv
        data = conn.recv(1024)

        if not data:
            break;
        else:
            print "-" * 20
            print data
            if "DONE" == data:
                break;

print "-" * 20
print "Shutting down..."

server.close()
os.remove(sockfile)

print "Finish server socket."