Warning

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

bfs_tree

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

Return an oriented tree constructed from of 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:

T – An oriented tree

Return type:

NetworkX DiGraph

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.