descendants

descendants(G, source)

Returns all nodes reachable from source in G.

Parameters:

GNetworkX Graph

sourcenode in G

Returns:

set()

The descendants of source in G

Raises:

NetworkXError

If node source is not in G.

See also

ancestors

Examples

>>> DG = nx.path_graph(5, create_using=nx.DiGraph)
>>> sorted(nx.descendants(DG, 2))
[3, 4]

The source node is not a descendant of itself, but can be included manually:

>>> sorted(nx.descendants(DG, 2) | {2})
[2, 3, 4]
----

Additional backends implement this function

cugraph : GPU-accelerated backend.

graphblas : OpenMP-enabled sparse linear algebra backend.