ip_gen with start ip and end ip

from ipaddress import ip_address, summarize_address_range


def ip_gen(*start_end):
    for addrs in start_end:
        start, end = map(ip_address, addrs)
        for subnet in summarize_address_range(start, end):
            yield from subnet.hosts()


A = ("10.0.0.0", "10.255.255.255")
B = ("172.16.0.0", "172.31.255.255")
C = ("192.168.0.0", "192.168.255.255")
gen = ip_gen(A, B, C)
ips = list(gen)

print(len(ips))

# 17891322