bgp2dot.py

#!/usr/bin/env python3
# coding: utf-8
import sys

peerings = []
print("graph dn42 {")
for line in sys.stdin:
	_as = line.split(" ")[:-1]
	i = 0
	while i < len(_as) - 1:
		if _as[i] != _as[i+1] and (_as[i], _as[i+1]) not in peerings:
			peerings.append((_as[i], _as[i+1]))
			print("{0} -- {1};".format(_as[i], _as[i+1]))
		i += 1
print("}")