When you run Scapy without a default IPv6 routing gateway, Scapy will display this annoying warning:
WARNING: No route found for IPv6 destination :: (no default route?)
You definitely don’t want to see it every time you run the script you built with Scapy. To get rid of it, simply add
import logging
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
before importing Scapy to suppress all messages below error messages