cli.py

#!/usr/bin/env python

from socket import *

def client():
    sock = socket(AF_INET, SOCK_STREAM)
    sock.connect(('127.0.0.1', 7777))
    sock.close()


if __name__ == '__main__':
    client()

epoll_accept_multi_awake.py

#!/usr/bin/env python

from socket import *
import select
import os


def server():
    sock = socket(AF_INET, SOCK_STREAM)
    sock.setblocking(False)
    sock.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
    sock.bind(('127.0.0.1', 7777))
    sock.listen(64)

    for i in range(3):
        if not os.fork():
            break

    pid = os.getpid()
    print(pid, 'start')
    ep = select.epoll()
    ep.register(sock, select.EPOLLIN)
    while True:
        try:
            evts = ep.poll()
        except KeyboardInterrupt:
            break
        for fd, event in evts:
            if fd == sock.fileno():
                try:
                    cli, cliaddr = sock.accept()
                except Exception as e:
                    print(pid, e)
                    continue
                print(pid, 'got', cliaddr)
                cli.close()
        else:
            continue
        break
    sock.close()
    print(pid, 'end')


if __name__ == '__main__':
    server()