networkx.algorithms.traversal.depth_first_search.dfs_successors¶

dfs_successors(G, source=None, depth_limit=None)[source]¶

Returns dictionary of successors in depth-first-search from source.

Parameters:	G (NetworkX graph) source (node, optional) – Specify starting node for depth-first search and return edges in the component reachable from source. depth_limit (int, optional (default=len(G))) – Specify the maximum search depth.
Returns:	succ – A dictionary with nodes as keys and list of successor nodes as values.
Return type:	dict

Examples

>>> G = nx.path_graph(5)
>>> nx.dfs_successors(G, source=0)
{0: [1], 1: [2], 2: [3], 3: [4]}
>>> nx.dfs_successors(G, source=0, depth_limit=2)
{0: [1], 1: [2]}

Notes

If a source is not specified then a source is chosen arbitrarily and repeatedly until all components in the graph are searched.

The implementation of this function is adapted from David Eppstein’s depth-first search function in PADS, with modifications to allow depth limits based on the Wikipedia article “Depth-limited search”.