Pcap parse with scapy

#!/usr/bin/python

from scapy import *
import sys
from datetime import datetime

def flow_it(pkt):
    snifftime = datetime.fromtimestamp(pkt.time).strftime('%Y-%m-%d %H:%M:%S').split(' ')[1]
    print ' '.join([snifftime, ' '.join(pkt.summary().split(' ')[4:9])])

if '-l' in sys.argv:
    sniff(prn=flow_it)
else:
    pkts = rdpcap(sys.argv[1])
    print(' '.join(['Date: ',datetime.fromtimestamp(pkts[0].time).strftime('%Y-%m-%d %H:%M:%S').split(' ')[0]]))
    for pkt in pkts:
       flow_it(pkt)