from socket import *

from threading import Thread

def communicate(conn):

    ''' 通信功能 '''

    while True:

        try:

            data = conn.recv(1024)

            if not data:break

            conn.send(data.upper())

        except ConnectionResetError:

            break

    conn.close()

def server(ip,port):

    ''' 负责建立连接 accept'''

    server = socket(AF_INET, SOCK_STREAM)

    server.bind((ip,port))

    server.listen(5)

    while True:

        conn,addr = server.accept()

        t = Thread(target=communicate, args=(conn,),)

        t.start()

    server.close()

if __name__ == "__main__":

    server('127.0.0.1', 8080)

from socket import *

client = socket(AF_INET, SOCK_STREAM)

client.connect(('127.0.0.1', 8080))

while True:

    msg = input(">>>:").strip()

    if not msg:break

    client.send(msg.encode("utf-8"))

    data = client.recv(1024)

    print(data.decode("utf-8"))

client.close()