resolver.py

#!/usr/bin/env python
import pprint
import dns.resolver

hostname = "hostname here"                                                                                                                                                                                          
resolver = dns.resolver.Resolver()

resolved_ip_list = []
answers = resolver.query(hostname, 'A')
for rdata in answers:
  resolved_ip_list.append(rdata.address)

unique_resolved_ip_list = set(resolved_ip_list)
pprint.pprint(unique_resolved_ip_list)