Server.py

# import socket programming library 
import socket

# import thread module 
from _thread import *
import threading

print_lock = threading.Lock()


# thread function
def threaded(c):
    while True:

        # data received from client 
        data = c.recv(1024)
        if not data:
            print('Bye')

            # lock released on exit 
            print_lock.release()
            break

        # reverse the given string from client 
        data = data[::-1]

        # send back reversed string to client 
        c.send(data)

        # connection closed
    c.close()

def processsData(data):
    pass


def Main():
    host = ""

    # reverse a port on your computer 
    # in our case it is 12345 but it 
    # can be anything 
    port = 12345
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.bind((host, port))
    print("socket binded to port", port)

    # put the socket into listening mode 
    s.listen(5)
    print("socket is listening")

    # a forever loop until client wants to exit 
    while True:
        # establish connection with client
        c, addr = s.accept()

        # lock acquired by client 
        print_lock.acquire()
        print('Connected to :', addr[0], ':', addr[1])

        # Start a new thread and return its identifier 
        start_new_thread(threaded, (c,))
    s.close()


if __name__ == '__main__':
    Main()