Theaded Socket

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import socket
import threading
from time import ctime

class ThreadedServer(object):
    def __init__(self, host, port):
        self.host = host
        self.port = port
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        self.sock.bind((self.host, self.port))

    def listen(self):
        self.sock.listen(5)
        while True:
            client, address = self.sock.accept()
            client.settimeout(60)
            threading.Thread(target = self.listenToClient,args = (client,address)).start()
 
    def listenToClient(self, client, address):
        size = 1024
        while True:
            try:
                data = client.recv(size)
                if not data or data.decode('utf-8') == 'END':
                    break
                if data:
                    # Set the response to echo back the recieved data 
                    response = data + bytes(ctime(), 'utf-8')
                    client.send(response)
                else:
                    raise error('Client disconnected')
            except:
                client.close()
                return False

if __name__ == "__main__":
    while True:
        port_num = 12346
        try:
            port_num = int(port_num)
            break
        except ValueError:
            pass

    ThreadedServer('',port_num).listen()