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Note

This documents the development version of NetworkX. Documentation for the current release can be found here.

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networkx.algorithms.dag.ancestors

ancestors(G, source)[source]

Returns all nodes having a path to source in G.

Parameters

  • G (NetworkX DiGraph) – A directed acyclic graph (DAG)

  • source (node in G)

Returns

The ancestors of source in G

Return type

set()