Warning

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

bfs_edges

bfs_edges(G, source, reverse=False)[source]

Produce edges in a breadth-first-search starting at source.

Parameters:
  • G (NetworkX graph) –
  • source (node) – Specify starting node for breadth-first search and return edges in the component reachable from source.
  • reverse (bool, optional) – If True traverse a directed graph in the reverse direction
Returns:

edges – A generator of edges in the breadth-first-search.

Return type:

generator

Examples

>>> G = nx.Graph()
>>> G.add_path([0,1,2])
>>> print(list(nx.bfs_edges(G,0)))
[(0, 1), (1, 2)]

Notes

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