title: ARP missing from the module scapy
body: <p>i am trying to use scapy in python
  while i try to import the scapy <code>import scapy</code>
  its just fine but the line <code>scapy.ARP()</code> causes a</p>
  
  <blockquote>
    <p>Traceback (most recent call last):
      File "", line 1, in 
    AttributeError: 'module' object has no attribute 'ARP'</p>
  </blockquote>
  
  <p>a <code>dir(scapy)</code> produces 
  '<code>['__builtins__', '__doc__', '__file__', '__name__', '__package__', '__path__']'</code>
  what might be the problem here ? do i need to install the packages separately if yes how to do it  ?</p>