1 from socket import socket
 2 server = socket() 4 server.bind(('', 9999))
 5 server.listen(10)
 6 
 7 conn, addr = server.accept()
 8 recv_date = conn.recv(1024)
 9 if recv_date:
10     print(recv_date)
11     conn.send(recv_date)
12 else:
13     conn.close()

 1 from socket import socket
 2 server = socket()
 3 server.setblocking(False)
 4 server.bind(('', 9999))
 5 server.listen(100)

 6 all_client = []
 7 while True:
 8     try:
 9         conn, addr = server.accept()
10         conn.setblocking(False)
11         all_client.append(conn)
12     except BlockingIOError:
13         pass
14 
15     for conn in all_client:
16         try:
17             recv_date = conn.recv(1024)
18             if recv_date:
19                 print(recv_date)
20                 conn.send(recv_date)
21             else:
22                 conn.close()
23                 all_client.remove(conn)
24         except BlockingIOError:
25             pass

 1 import socket
 2 import selectors 
 3 epoll_selector = selectors.EpollSelector() 
 4 server = socket.socket()
 5 server.bind(('', 9980))
 6 server.listen(1000)
 7 
 8 def recv(conn):
 9     recv_date= conn.recv(1024)
10     if recv_date:
11         print(recv_date.decode())
12         conn.send(recv_date)
13     else:
14         epoll_selector.unregister(conn)  
15         conn.close()
16 
17 def accept(server1):
18     conn, addr = server1.accept()
19     epoll_selector.register(conn, selectors.EVENT_READ, recv)
20 
21 epoll_selector.register(server, selectors.EVENT_READ, accept)
22 
23 while True:
24     events = epoll_selector.select()
25     for key, mask in events:
26         callable = key.data    
27         sock = key.fileobj  
28         callable(sock)

 1 import multiprocessing
 2 from socket import socket
 3 server = socket()
 4 server.bind(('', 9999))
 5 server.listen(100)
 6 
 7 def func(conn):
 8     while True:
 9         recv_date = conn.recv(1024)
10         if recv_date:
11             print(recv_date)
12             conn.send(recv_date)
13         else:
14             conn.close()
15 
16 while True:
17     conn, addr = server.accept()
18     m = multiprocessing.Process(target=func, args=(conn, ))
19     m.start()

 1 from socket import *
 2 import threading
 3 
 4 server = socket()
 5 server.bind(('', 9999))
 6 server.listen(100)
 7 
 8 def func(conn):
 9     while True:
10         recv_date = conn.recv(1024)
11         if recv_date:
12             print(recv_date)
13             conn.send(recv_date)
14         else:
15             conn.close()
16 
17 while True:
18     conn, addr = server.accept()
19     T = threading.Thread(target=func, args=(conn, ))
20     T.start()