def resolve():
"""Resolve a hostname using the resolver """
parser = ArgumentParser(description="DNS Client")
parser.add_argument("hostname", help="hostname to resolve")
parser.add_argument("--timeout",
metavar="time",
type=int,
default=5,
help="resolver timeout")
parser.add_argument("-c",
"--caching",
action="store_true",
help="Enable caching")
parser.add_argument("-t",
"--ttl",
metavar="time",
type=int,
default=0,
help="TTL value of cached entries (if > 0)")
parser.add_argument("-n",
"--nameserver",
type=str,
default="198.41.0.4",
help="set nameserver")
args = parser.parse_args()
resolver = Resolver(args.timeout, args.caching, args.ttl, args.nameserver)
resolver.doLogging = True
hostname, aliaslist, ipaddrlist = resolver.gethostbyname(args.hostname)
print(hostname)
print(aliaslist)
print(ipaddrlist)
