Warning

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

__len__

DiGraph.__len__()

Return the number of nodes. Use the expression ‘len(G)’.

Returns:

nnodes : int

The number of nodes in the graph.

Examples

>>> G = nx.Graph()   # or DiGraph, MultiGraph, MultiDiGraph, etc
>>> G.add_path([0,1,2,3])
>>> len(G)
4