import hashlib

mac=b'D9:7B:B1:52:67:1F'
mac_r='F1:76:25:1B:B7:9D'
print(mac[::-1])

m = hashlib.md5(mac[::-1])
md5hash = m.hexdigest()
print(md5hash[0:8])
print(md5hash[16:24])