gistfile1.txt

ben@abraxas:/work/cloud-init$ grep -A3 -n "def _is_default_route" cloudinit/net/sysconfig.py 
30:def _is_default_route(route):
31-    default_nets = ('::', '0.0.0.0')
32-    return route['prefix'] == 0 and route['network'] in default_nets
33-

# But for Fedora:
[root@utl-28158283-97546 ~]# grep -A6 -n "def _is_default_route" /usr/lib/python3.6/site-packages/cloudinit/net/sysconfig.py
28:def _is_default_route(route):
29-    if route['network'] == '::' and route['netmask'] == 0:
30-        return True
31-    if route['network'] == '0.0.0.0' and route['netmask'] == '0.0.0.0':
32-        return True
33-    return False
34-