服務(wù)端

import socketserver


class MyRequestHandle(socketserver.BaseRequestHandler):  #定義一個類，引用sockerserver的基類socketserver.BaseRequestHandler
    def handle(self):
        print(self.request)                       # 此步，相當(dāng)于tcp套接字下面2步
        # conn, client_addr = phone.accept()
        # print(client_addr)

        while True:
            try:
                cmd = self.request.recv(1024)      # self.request 相當(dāng)于conn
                if cmd == 0: break
                self.request.send(cmd.upper())
            except Exception:
                break


s = socketserver.ThreadingTCPServer(('127.0.0.1', 8899), MyRequestHandle)
s.serve_forever()

客戶端 (開啟多個客戶端)

from socket import *

client=socket(AF_INET,SOCK_STREAM)
client.connect(('127.0.0.1',8899))
while True:
    cmd=input('小寫轉(zhuǎn)換大寫>>>>'.strip())
    if len(cmd)==0:continue
    client.send(cmd.encode('utf-8'))

    msg=client.recv(1024)
    print(msg.decode('utf-8'))

執(zhí)行如下

客戶端1:

請輸入命令>>：ls
LS
請輸入命令>>：

客戶端2:

請輸入命令>>：hello
HELLO