def add_to_quadruples(h_v, d_v, r, r_inver):
if is_core(r):
quadruples.append([
graph.node[h_v]['value'], graph.node[d_v]['value'], r, h_v,
d_v
])
else:
quadruples.append([
graph.node[d_v]['value'], graph.node[h_v]['value'],
r_inver, d_v, h_v
])
def cannonical(r):
return "-of" in r and not is_core(r) or "-of" not in r and is_core(
r)