tcpserver2b.py

import socket
import time
import select


class MultiClientServer:

    def __init__(self, address, port):
        self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        self.socket.bind((address, port))
        self.socket.listen(10)
        self.clients = []

    def run(self):
        while True:
            self.tick()

    def tick(self):
        # reactor pattern
        interesting_sockets = self.clients + [self.socket]
        ready_sockets, _, _ = select.select(interesting_sockets, [], [])
        for ready_socket in ready_sockets:
            if ready_socket == self.socket:
                new_client, sender = self.socket.accept()
                print('new connection from', sender)
                self.clients.append(new_client)
            else:
                data = ready_socket.recv(4096)
                if not data:
                    self.clients.remove(ready_socket)
                    ready_socket.close()
                else:
                    print(data)

MultiClientServer('127.0.0.1', 9090).run()