def randomize_direction(f: nx.Graph, rng: nrd.Generator) -> nx.DiGraph:
g = f.to_directed()
for (i, j) in f.edges:
if rng.random() > 0.5:
g.remove_edge(i, j)
else:
g.remove_edge(j, i)
return g
def randomize_direction_adj(adj: npt.NDArray[np.int64],
rng: nrd.Generator) -> npt.NDArray[np.int64]:
new_adj = np.zeros(adj.shape, np.int64)
n = adj.shape[0]
for i in range(n):
for j in range(i + 1, n):
assert adj[i][j] == adj[j][i], "the given adj is not symmetric"
if adj[i][j] == 0:
continue
if rng.random() >= 0.5:
new_adj[i][j] = 1
else:
new_adj[j][i] = 1
return new_adj
