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1. The server supports only one client connection

Server-side program (server.py):

import socket

# Create a server-side socket object
server = socket.socket()
# Bind IP (ipocnfig command looks at IP address) and port (custom network port can be used without conflicting with an existing system port)
server.bind(('192.168.5.106', 8000))
# You can wait for five connections
server.listen(5)
# Wait for client to connect, if not, wait in order
# conn: The object through which the client connects to the server to send and receive data
# addr: client address information
print('Server is already running,Waiting for client to connect...')
conn, addr = server.accept()  # This is where the blockage occurs, and only when the client connects, the client connection is acquired and the communication begins.
print('Someone connected!')
data = conn.recv(1024)  # 1024: The server fetches data up to 1024 bytes at a time
print('The client sent me:', data)
conn.send(b'May I help you?')
conn.close()  # Disconnect from client
server.close()  # Shut down the service on the server side

Client program (client.py):

import socket

# Create client socket object
client = socket.socket()
client.connect(('192.168.5.106', 8000))  # Blocked, code will not continue until the connection is successful
client.send(b'hello')  # Send a message to the server after connecting to it
data = client.recv(1024)  # Messages waiting to be sent by the server
print('The server replied to me:',data)
client.close()  # Close Connection

Server side running:

Client Run:

2. Server supports multi-client connections

Server (server.py):

import socket

# Create a server-side socket object
server = socket.socket()
# Bind IP and Port
server.bind(('192.168.5.106', 8000))
# You can wait for five connections
server.listen(5)
# Wait for client to connect, if not, wait in order
# conn: The object through which the client connects to the server to send and receive data
# addr: client address information
while True:
    print('Server is already running,Waiting for client to connect...')
    conn, addr = server.accept()  # This is where the blockage occurs, and only when the client connects, the client connection is acquired and the communication begins.
    print('Someone connected!')
    data = conn.recv(1024)  # Byte type
    resp = data + ',Hello!'.encode('utf-8')
    print('Sent "', resp.decode('utf-8'), '"To the client...')
    conn.send(resp)  # Byte type
    conn.close()
    print('The server disconnected...', '\n')

Client program (client.py):

import socket

# Create client socket object
client = socket.socket()
client.connect(('192.168.5.106', 8000))  # Blocked, code will not continue until the connection is successful
name = input('Enter your name:')
client.send(name.encode('utf-8'))  # Converts a string to a byte, which is sent to the server when it is connected
resp = client.recv(1024)  # Blocking, waiting for messages from the server
print(resp.decode('utf-8'))
client.close()  # Close Connection

Server side run record:

Client 1 run record:

Client 2 run record:

3. Online chat tools

Server-side program (server.py):

import socket

# Create a server-side socket object
server = socket.socket()
# Bind IP and Port
server.bind(('192.168.5.106', 8000))
# You can wait for five connections
server.listen(5)
# Wait for client to connect, if not, wait in order
# conn: The object through which the client connects to the server to send and receive data
# addr: client address information
while True:
    print('\n System Tip: Server is already running,Waiting for client to connect...')
    conn, addr = server.accept()  # This is where the blockage occurs, and only when the client connects, the client connection is acquired and the communication begins.
    print('System Tips:' + str(list(addr)) + 'The client has connected to this server...\n')
    while True:
        data = conn.recv(1024)  # Byte type
        if data == b'0':
            break
        print('System Tip: Received the message from the client: "' + data.decode('utf-8') + '"')
        resp = data + ',Hello!'.encode('utf-8')
        print('System Tip: Sent "', resp.decode('utf-8'), '"To the client...')
        conn.send(resp)  # Byte type
        print('System Tip: and' + str(list(addr)) + 'The client's connection is not closed, so you can continue to have a conversation with the client...')
    conn.close()
    print('System Tip: and' + str(list(addr)) + 'The client connection is closed...')

Client program (client.py):

import socket

# Create client socket object
client = socket.socket()
client.connect(('192.168.5.106', 8000))  # Blocked, code will not continue until the connection is successful
while True:
    name = input('System prompt, please enter your name(Enter 0 to close the connection): \n')
    client.send(name.encode('utf-8'))  # Converts a string to a byte, which is sent to the server when it is connected
    if name == '0':
        break
    resp = client.recv(1024)  # Blocking, waiting for messages from the server
    print('System Tip: Client replies "' + resp.decode('utf-8') + '"')
client.close()  # Close Connection
print('System Tip: Close the client connection!')

Server side run record:

Client 1 side running record:

Client 2 side running record:

Of course there can be as many clients...