###use default dhcp lease file(/var/lib/dhcpd/dhcpd.leases)
python get_ip_mac_in_lease.py
###specify target dhcp lease file
python get_ip_mac_in_lease.py /path/to/dhcpd.leases
###dev under python 3.8.6 on centos7
###install requirements by using:
pip instsall -r requrirement.txt