Python下的socket编程

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()