Warning

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

networkx.classes.function.number_of_selfloops

number_of_selfloops(G)

Return the number of selfloop edges.

A selfloop edge has the same node at both ends.

Returns:nloops – The number of selfloops. Return type:int

See also

nodes_with_selfloops(), selfloop_edges()

Examples

>>> G = nx.Graph()   # or DiGraph, MultiGraph, MultiDiGraph, etc
>>> G.add_edge(1, 1)
>>> G.add_edge(1, 2)
>>> nx.number_of_selfloops(G)
1