Warning

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

# dfs_labeled_edges¶

dfs_labeled_edges(G, source=None)[source]

Produce edges in a depth-first-search (DFS) labeled by type.

Parameters : G : NetworkX graph source : node, optional Specify starting node for depth-first search and return edges in the component reachable from source. edges: generator A generator of edges in the depth-first-search labeled with ‘forward’, ‘nontree’, and ‘reverse’.

Notes

Based on http://www.ics.uci.edu/~eppstein/PADS/DFS.py by D. Eppstein, July 2004.

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

Examples

>>> G = nx.Graph()