Code for implementing Socket communication in Python

Server code: the server must be opened first

from socket import *

"""服务端"""
# 主机地址为0.0.0.0，表示绑定本机所有网络接口ip地址
# 等待客户端连接
IP = '127.0.0.1'
# 端口号
PORT = 50000
# 定义一次从socket缓存区中最多读入512
BUFLEN = 512

# 实例化一个socket对象
# 参数 AF_INET表示该socket网络层使用IP协议
# 参数 SOCK_STREAM 表示该socket传输层使用tcp协议
listenSocket = socket(AF_INET,SOCK_STREAM)
listenSocket.bind((IP,PORT))
listenSocket.listen(5)
print(f'服务端启动成功，在{
      
      PORT}端口等待客户连接')

dataSocket, addr = listenSocket.accept()
print('接收一个客户端连接：',addr)

while True:
    info = input('>>>')
    dataSocket.send(bytes(info, encoding='utf-8'))
    recved = dataSocket.recv(BUFLEN)

    if not recved:
        break

    info = recved.decode()
    print(f'收到对方信息{
      
      info}')
    # dataSocket.send(f'服务端接收到信息{info}'.encode())
dataSocket.close()
listenSocket.close()

Client code:

from socket import *

"""客户端"""
# 主机地址为0.0.0.0，表示绑定本机所有网络接口ip地址
# 等待客户端连接
IP = '127.0.0.1'
# 端口号
SERVER_PORT = 50000
BUFLEN = 512

dataSocket = socket(AF_INET, SOCK_STREAM)
dataSocket.connect((IP, SERVER_PORT))


while True:
    recved = dataSocket.recv(BUFLEN)
    if not recved:
        break
    info = recved.decode()
    print(f'收到对方信息{
      
      info}')

dataSocket.close()

operation result

1. The server is opened before the client, and the server after opening is shown in the figure below:

2. The server enters ok and transmits ok to the client.

3. The client receives the transmitted ok