is_weighted(G, edge=None, weight='weight')
A NetworkX graph.
A 2-tuple specifying the only edge in G that will be tested. If None, then every edge in G is tested.
The attribute name used to query for edge weights.
If the specified edge does not exist.
A boolean signifying if G, or the specified edge, is weighted.
Returns True if G has weighted edges.
>>> G = nx.path_graph(4)
... nx.is_weighted(G) False
>>> nx.is_weighted(G, (2, 3)) False
>>> G = nx.DiGraph()See :
... G.add_edge(1, 2, weight=1)
... nx.is_weighted(G) True
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networkx.classes.function.is_weighted
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