Python でのソケット プログラミング

import socket

HOST = ""
PORT = 8870
sk = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sk.bind((HOST, PORT))
sk.listen(5)
while True:
    print("服务器启动")
    conn, addr = sk.accept()
    print(addr)
    while True:
        try:
            server_recv_data = conn.recv(1024)  #若客户端输入exit退出，则此处并没有阻塞，只是收到的信息为空
            #若客户端输入空，即直接按下回车键，那么此处将会被阻塞
            if len(server_recv_data) == 0:
                print("收到为空")
                break
        except ConnectionResetError as err:
            print(err)
            break
        print(str(server_recv_data, encoding="utf-8"))
        server_resp_data = input(">>>")
        conn.sendall(bytes(server_resp_data, encoding="utf-8"))
    conn.close()
sk.close()

import socket

HOST = "127.0.0.1"
PORT = 8870
sk = socket.socket()
sk.connect((HOST, PORT))
print("客户端启动...")

while True:
    inp = input(">>>")
    if inp == "exit"or not inp:　　#此处需要说明的是，当直接在客户端按下回车enter键的时候，inp为空
        break
    sk.sendall(bytes(inp, encoding="utf-8"))
    server_response = sk.recv(1024)
    print(str(server_response, encoding="utf-8"))
sk.close()