networkx.classes.function.is_weighted¶
-
is_weighted
(G, edge=None, weight='weight')[source]¶ Returns True if
G
has weighted edges.- Parameters
G (graph) – A NetworkX graph.
edge (tuple, optional) – A 2-tuple specifying the only edge in
G
that will be tested. If None, then every edge inG
is tested.weight (string, optional) – The attribute name used to query for edge weights.
- Returns
A boolean signifying if
G
, or the specified edge, is weighted.- Return type
- Raises
NetworkXError – If the specified edge does not exist.
Examples
>>> G = nx.path_graph(4) >>> nx.is_weighted(G) False >>> nx.is_weighted(G, (2, 3)) False
>>> G = nx.DiGraph() >>> G.add_edge(1, 2, weight=1) >>> nx.is_weighted(G) True