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This documents an unmaintained version of NetworkX. Please upgrade to a maintained version and see the current NetworkX documentation.

# networkx.DiGraph.predecessors¶

DiGraph.predecessors(n)[source]

Returns an iterator over predecessor nodes of n.

A predecessor of n is a node m such that there exists a directed edge from m to n.

Parameters: n (node) – A node in the graph NetworkXError – If n is not in the graph.