Python Multithreaded TCP server example

server.py

#!/usr/bin/python

import socket               # Import socket module
from threading import Thread

def on_new_client(clientsocket, addr):
    try:
        while True:
            msg = clientsocket.recv(1024)
            if not msg:
                break
            print(addr, ' >> ', str(msg, 'utf-8'))
            # echo the message back
            clientsocket.send(msg)
    finally:
        print('Connection to client', addr, 'closed')
        clientsocket.close()

s = socket.socket()         # Create a socket object
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
port = 50000                # Reserve a port for your service.
s.bind(('127.0.0.1', port)) # Bind to the port

s.listen(5)                 # Now wait for client connection.
print('Server started!')

try:
    while True:
        c, addr = s.accept()     # Establish connection with client.
        print('Got connection from', addr)
        Thread(target=on_new_client, args=(c,addr)).start()
finally:
    s.close()