title: Scapy sniff the packet multiple times?
body: <p>I am using Scapy to capture packets by using the following code </p>
  
  <pre><code>from scapy.all import *
  
  def verify(p):
       p.display()
  
  sniff(prn=verify, iface="lo")
  </code></pre>
  
  <p>The sniff function captures every packet multiple times.
  For example, if I have a DNS query packet, this packet will display two times.
  How can make The sniff function to capture each packet only single time?</p>