client.py

import socket
import sys


server_ip = '127.0.0.1'
server_port = 9090


def main(ipport):
    server_ip, server_port = ipport.split(":")
    client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    client.connect((server_ip, int(server_port)))
    client.send(b'this is a test')
    response = client.recv(9000)

if __name__ == "__main__":
    if len(sys.argv) != 2:
        print("Usage: python3 thisthing.py ip:port")
        sys.exit(1)
    main(sys.argv[1])

server.py

import socket
import sys


# bind_ip = '0.0.0.0'
# bind_ip = '127.0.0.1'
bind_ip = '192.168.0.100'
bind_port = 9090
server_socket = None

def handle_client(client_sock, address):
    print('New client from %s' % str(address))
    request = client_sock.recv(9000)
    client_sock.close()

def main(ipport):
    global server_socket
    bind_ip, bind_port = ipport.split(":")
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_socket.bind((bind_ip, int(bind_port)))
    server_socket.listen(1) # backlog of 1 connection
    print("serving on {}:{}".format(bind_ip, bind_port))
    while True:
        client_sock, address = server_socket.accept()
        handle_client(client_sock=client_sock, address=address)



if __name__ == "__main__":
    try:
        if len(sys.argv) != 2:
            print("Usage: python3 thisthing.py ip:port")
            sys.exit(1)
        main(sys.argv[1])
    except KeyboardInterrupt:
        # print(ex)
        if server_socket:
            server_socket.close()