import socket

server = socket.socket()
server.setblocking(False)
server.bind((‘0.0.0.0‘,8080))
server.listen(1000)

all_connection = []#所有连接的客户端,用集合比列表更快
while True:
    try:
        connection,remote_address = server.accept()#非阻塞对等连接套接字生成
        connection.setblocking(False)#connection是新生成的，也需要设置成非阻塞
        all_connection.append(connection)
    except BlockingIOError:
        pass
    to_handler = [connection for connection in all_connection]
    for connection in to_handler:
        try:
            recv_data = connection.recv(1024)
            if recv_data:
                print(recv_data)
                connection.send(recv_data)
            else:
                connection.close()
                all_connection.remove(connection)#如果这个客户已经处理完毕，就移除

        except BlockingIOError:
            pass

import socket
host = ‘192.168.215.128‘
port = 8080
client = socket.socket()
client.connect((host,port))
# client.send(b‘haha‘)
msg = input(‘-->‘)
client.send(msg.encode(‘utf-8‘))
recv_data = client.recv(1024)
print(recv_data.decode(‘utf-8‘))
client.close()