o ˷e@sddlZdgZdddZdS)Ns_metricTcs,|rtdttfddDS)aReturns the s-metric of graph. The s-metric is defined as the sum of the products deg(u)*deg(v) for every edge (u,v) in G. If norm is provided construct the s-max graph and compute it's s_metric, and return the normalized s value Parameters ---------- G : graph The graph used to compute the s-metric. normalized : bool (optional) Normalize the value. Returns ------- s : float The s-metric of the graph. References ---------- .. [1] Lun Li, David Alderson, John C. Doyle, and Walter Willinger, Towards a Theory of Scale-Free Graphs: Definition, Properties, and Implications (Extended Version), 2005. https://arxiv.org/abs/cond-mat/0501169 zNormalization not implementedc3s(|]\}}||VqdS)N)degree).0uvGR/var/www/ideatree/venv/lib/python3.10/site-packages/networkx/algorithms/smetric.py &s&zs_metric..)nx NetworkXErrorfloatsumedges)r normalizedr rr rs )T)networkxr __all__rr r r r s