tcp-client-server.py

#!/usr/bin/env python3

# simple_tcp_client.py

import socket


TCP_IP = '127.0.0.1'
TCP_PORT = 5005
BUFFER_SIZE = 1024
MESSAGE = b"Hello, World!"

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((TCP_IP, TCP_PORT))
s.send(MESSAGE)
data = s.recv(BUFFER_SIZE)
s.close()

print("received data: {}".format(data))


# simple_tcp_server.py

import socket


TCP_IP = '127.0.0.1'
TCP_PORT = 5005
BUFFER_SIZE = 20  # Normally 1024, but we want fast response

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((TCP_IP, TCP_PORT))
s.listen(1)

conn, addr = s.accept()
print('server - connection address: {}'.format(addr))
while 1:
    data = conn.recv(BUFFER_SIZE)
    if not data: break
    print("server - received data: {}".format(data))
    conn.send(data)  # echo

conn.close()