genconf.py

with open('dhcpd.conf') as f:
    lines = f.readlines()

hostname=''
mac=''
mac_host = {'d0-67-e5-e8-d4-85':'elcapitan3a'}
host_mac = {v:k for k,v in mac_host.items()}
for line in lines:
    if 'host ' in line:
        hostname = line.split(' ')[-2]
    if "hardware" in line:
        mac = line.split(' ')[-1][:-2].replace(':', '-')
        mac_host[mac] = hostname
        host_mac[hostname] = mac

host_mac

import jinja2

e = jinja2.Environment()

tpl7 = e.from_string(open('centos7.tpl').read())
tpl8 = e.from_string(open('centos8.tpl').read())

for i in range(1,62):
    hostname = f'c{i}'
    mac = host_mac[hostname]
    with open(f'centos7/{hostname}-{mac}.cfg', 'w') as f:
        f.write(tpl7.render(hostname=hostname))
    with open(f'centos8/{hostname}-{mac}.cfg', 'w') as f:
        f.write(tpl8.render(hostname=hostname))

tpl = e.from_string(open('pxemenu.tpl').read())

for mac in mac_host.keys():
    hostname = mac_host[mac]
    with open(f'pxelinux.cfg/01-{mac}', 'w') as f:
        f.write(tpl.render(mac=mac, hostname=hostname))