I'm trying to run this file that uses the scapy library. It doesnt recognize scapy when I run the code though:

```
from scapy.all import *

def arp_display(pkt):
  if pkt[ARP].op == 1: #who-has (request)
    if pkt[ARP].psrc == '0.0.0.0': # ARP Probe
      print ("ARP Probe from: " + pkt[ARP].hwsrc)

print (sniff(prn=arp_display, filter="arp", store=0, count=10))

```

This is the error message:

```
/Library/Frameworks/Python.framework/Versions/3.5/bin/python3.5 /Users/me/PycharmProjects/AmazonDash/DashButton
Traceback (most recent call last):
  File "/Users/me/PycharmProjects/AmazonDash/DashButton", line 2, in <module>
from scapy.all import *
ImportError: No module named 'scapy'

```

I installed homebrew and used it to download and install Scapy. I assumed that because I did that, my PyCharm would be able to run the script. I'm not so familiar with Python or PyCharm though, so which step am I missing? I also tried updating the Path in the preferences of PyCharm, pointing it to the scapy folder that was added by homebrew.