scapy dns sniff with additional records - parsing

Question

i have python/scapy sniffer for DNS.
I am able to sniff DNS messages and get IP/UDP source and destination IP address and ports as well as DNS but I have problems parsing and getting additional answers and additional records if there is more then one.
from scapy i see DNS data i can get but do not know how to get additional records with ls(DNS),ls(DNSQR) and ls(DNSRR)
I would appreciate some help or solution to work this out.
My python/scapy script is below
#!/usr/bin/env python
from scapy.all import *
from datetime import datetime
import time
import datetime
import sys
############# MODIFY THIS PART IF NECESSARY ###############
interface = 'eth0'
filter_bpf = 'udp and port 53'
# ------ SELECT/FILTER MSGS
def select_DNS(pkt):
pkt_time = pkt.sprintf('%sent.time%')
# ------ SELECT/FILTER DNS MSGS
try:
if DNSQR in pkt and pkt.dport == 53:
# queries
print '[**] Detected DNS Message at: ' + pkt_time
p_id = pkt[DNS].id
cli_ip = pkt[IP].src
cli_port = pkt.sport
srv_ip = pkt[IP].dst
srv_port = pkt.dport
query = pkt[DNSQR].qname
q_class = pkt[DNSQR].qclass
qr_class = pkt[DNSQR].sprintf('%qclass%')
type = pkt[DNSQR].sprintf('%qtype%')
#
elif DNSRR in pkt and pkt.sport == 53:
# responses
pkt_time = pkt.sprintf('%sent.time%')
p_id = pkt[DNS].id
srv_ip = pkt[IP].src
srv_port = pkt.sport
cli_ip = pkt[IP].dst
cli_port = pkt.dport
response = pkt[DNSRR].rdata
r_class = pkt[DNSRR].rclass
rr_class = pkt[DNSRR].sprintf("%rclass%")
type = pkt[DNSRR].sprintf("%type%")
ttl = pkt[DNSRR].ttl
len = pkt[DNSRR].rdlen
#
print response
except:
pass
# ------ START SNIFFER
sniff(iface=interface, filter=filter_bpf, store=0, prn=select_DNS)