python install scapy

# pip install scapy

Downloading/unpacking scapy
  Could not find a version that satisfies the requirement scapy (from versions: 2.2.0-dev.linux-x86_64, 2.2.0-dev, 2.2.0-dev)

# pip install hg+http://hg.secdev.org/scapy

# apt-get install python-scapy 

References :
Installing Scapy via PIP « In Loki We Trust