def _cmp_by_igp_cost(path1, path2):
    # TODO(PH): Currently BGPS has no concept of IGP and IGP cost.
    return None
Select the route with the lowest IGP cost to the next hop.
dataset/ETHPy150Open osrg/ryu/ryu/services/protocols/bgp/processor.py/_cmp_by_igp_cost