ping a CIDR network and find alive and not alive hosts

ping_network.py

#!/usr/bin/env python3
import ipaddress
import subprocess

'''
complete private networks:
 10.0.0.0/8
 172.16.0.0/12
 192.168.0.0/16
'''

NETWORK_CIDR = "192.168.19.0/24"

net = ipaddress.ip_network(NETWORK_CIDR)
count = net.num_addresses
print(u"checking {} addresses:".format(count))

sum_alive = 0
sum_not_alive = 0

for ip in net:
    ip = str(ip)
    code = 0
    status = "alive"
    try:
        pingreturn = subprocess.check_output(['ping', '-o', '-c 3', '-t 1', '-q', ip])
        sum_alive += 1
    except subprocess.CalledProcessError as e:
        code = e.returncode
        status = "not alive"
        sum_not_alive += 1

    print(u"  {0:s} is {1:s} (ping result: {2})".format(ip, status, code))

print(u"{} alive, {} not alive, {} total.".format(sum_alive, sum_not_alive, count))

einfach NETWORK_CIDR direkt setzen, dann das Skript wie gewohnt ausführen.