Code:
## Import Scapy module
from scapy.all import *
## Create a Packet Count var
packetCount = 0
## Define our Custom Action function
def customAction(packet):
    global packetCount
    packetCount += 1
    return "Packet #%s: %s ==> %s" % (packetCount, packet[0][1].src, packet[0][1].dst)
## Setup sniff, filtering for IP traffic
sniff(10, filter="ip",prn=customAction)



Output:
felix@felix-VirtualBox:~/share$ sudo python random.py
WARNING: No route found for IPv6 destination :: (no default route?)
Packet #1: 192.168.178.51 ==> 192.168.178.255
Packet #2: 192.168.178.1 ==> 192.168.178.255
Packet #3: 192.168.178.1 ==> 192.168.178.255
Packet #4: 192.168.178.1 ==> 224.0.0.1
Packet #5: 192.168.178.91 ==> 224.0.0.22
Packet #6: 192.168.178.91 ==> 224.0.0.22
Packet #7: 192.168.178.106 ==> 224.0.0.22
Packet #8: 192.168.178.91 ==> 192.168.178.255
Packet #9: 192.168.178.21 ==> 255.255.255.255
Packet #10: 192.168.178.21 ==> 192.168.178.255
Traceback (most recent call last):
  File "random.py", line 2, in <module>
    from scapy.all import *
  File "/usr/local/lib/python2.7/dist-packages/scapy/all.py", line 10, in <module>
    from base_classes import *
  File "/usr/local/lib/python2.7/dist-packages/scapy/base_classes.py", line 14, in <module>
    import re,random,socket
  File "/home/felix/share/random.py", line 11, in <module>
    sniff(10, filter="ip",prn=customAction)
NameError: name 'sniff' is not defined