Multithread socket server based support concurrent

Process pool | thread pool (synchronous, asynchronous blocking, non-blocking) 
multi-threading: IO-intensive 
multi-process: Compute-intensive 
thread is a cpu to run the unit, the process is resource unit

from socket import *
from threading import Thread

def comunicat(conn):
    while True:  # 通信循环
        try:
            data = conn.recv(1024)
            if len(data) == 0: break
            conn.send(data.upper())
        except ConnectionResetError:
            break
    conn.close()

def server(ip, port, backlog=5):
    server = socket(AF_INET, SOCK_STREAM)
    server.bind((ip,port))
    server.listen(backlog)

    while True:  # 链接循环
        conn, client_addr = server.accept()
        print(client_addr)

        #通信
        t=Thread(target=comunicat,args=(conn,))
        t.start()

if __name__ == '__main__':
    s=Thread(target=server,args=('127.0.0.1',8081))
    s.start()

Server

from socket import *

client=socket(AF_INET,SOCK_STREAM)
client.connect(('127.0.0.1',8081))
while True:
    msg=input(">>:").strip()
    if len(msg) == 0: continue
    client.send(msg.encode('utf-8'))
    data=client.recv(1024)
    print(data.decode('utf-8'))

Client

Achieved when the server is turned on, you can run multiple clients, but there are ten thousand client, the server will open multiple threads to run, this will be a waste of resources