title: ARP in scapy not working, and getting an error Cannot find reference 'ARP' in 'all.py
body: <p>just wanted to see if there’s a way to resolve a warning i get in pyCharm.</p>
  <p>Currently watching Learn python &amp; ethical hacking from scratch: Using Scapy To Create an ARP Request.</p>
  <p>When using</p>
  <pre><code>import scapy.all as scapy 
  arpRequest = scapy.ARP()
  </code></pre>
  <p>I’m receiving a warning ( the program runs, but the warning is of course annoying)</p>
  <p>Warning:</p>
  <p><strong><code>Cannot find reference 'ARP' in 'all.py'</code></strong></p>
  <p>Any ideas?</p>