find every device connected to the subnet with the pair MAC Address <---> Subnet IP using scapylibrary

scan-l2.py

#! /usr/bin/env python
# scan-layer2 : arpings a subnet to find every device connected to the subnet

import sys
if len(sys.argv) != 2:
    print ("Usage: scan-layer2 \n  eg: scan-layer2.py 192.168.1.0/24")
    sys.exit(1)

from scapy.all import srp,Ether,ARP,conf
ans,unans=srp(Ether(dst="ff:ff:ff:ff:ff:ff")/ARP(pdst=sys.argv[1]),timeout=10)

for snd,rcv in ans:
    print(rcv.sprintf(r"%Ether.src% & %ARP.psrc%"))