tcp_sever.py

#!/usr/bin/env python 

""" 
A simple echo server 
""" 

import socket 

host = '' 
port = 20602
backlog = 5 
size = 20
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
s.bind((host,port)) 
s.listen(backlog)

anchor = None

while True:
    client, address = s.accept()
    print('Client connected ({})'.format(address))

    
    data = client.recv(size)
    if data:
        print(data)

    if anchor is not None:
        client.send(b'yes')
        
        data = client.recv(100)
        if data:
            client.send((anchor[0]+','+str(anchor[1])).encode())
            client.send(anchor[2])

    else:
        client.send(b'no')

        data = client.recv(100)
        if data:
            guid, size = data.decode().split(',')
            print("GUID {}".format(guid))
            size = int(size)
            client.send(b'bird up')

        data = client.recv(size)
        if data:
            anchor_data = bytes(data)
            client.send(b'best show on tv')

        anchor = (guid, size, anchor_data)
    
    client.close()