Send image to flipdot display

flipdots.py

#!/usr/bin/env python3

import socket
import sys
from PIL import Image

host = '192.168.3.36';
port = 2323;

w = 48
h = 20

def usage():
    print('flipdots.py IMAGEFILE')

def create_socket():
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        return s
    except socket.error:
        print('Failed to create socket')
        sys.exit(1)

def send_bytes(socket, msg):
    try:
        socket.sendto(msg, (host, port))
    except socket.error:
        print('Socket Error Code: ' + str(msg[0]) + ' Message ' + msg[1])
        sys.exit(2)

def send_frame(s, i):
    i.thumbnail((w,h))
    i = i.convert('1').transpose(Image.ROTATE_90)
    send_bytes(s, i.tobytes())
    #i.show()

def main(argv):
    if len(argv) != 1:
        usage()
        sys.exit()

    f = argv[0]
    s = create_socket()
    i = Image.open(f)

    # DEBUG
    # print(i.size, i.mode, "ANIM:", i.is_animated, "FRAMES:", i.n_frames)

    send_frame(s, i)
    while True:
        try:
            i.seek(i.tell() + 1)
            send_frame(s, i)
        except EOFError:
            # DEBUG
            # print("No more frames to send")
            break

if __name__ == "__main__":
       main(sys.argv[1:])