- lowest_common_ancestor(G, node1, node2, default=None)¶
Compute the lowest common ancestor of the given pair of nodes.
- GNetworkX directed graph
- node1, node2nodes in the graph.
Returned if no common ancestor between
- The lowest common ancestor of node1 and node2,
- or default if they have no common ancestors.
Only defined on non-null directed acyclic graphs. Takes n log(n) time in the size of the graph. See
all_pairs_lowest_common_ancestorwhen you have more than one pair of nodes of interest.