h dZddlZddlmZgdZedej dZedej dZedej dZ y) zAttracting components.N)not_implemented_for)number_attracting_componentsattracting_componentsis_attracting_component undirectedc#Kttj|}tj||}|D]}|j |dk(s|| yw)aGenerates the attracting components in `G`. An attracting component in a directed graph `G` is a strongly connected component with the property that a random walker on the graph will never leave the component, once it enters the component. The nodes in attracting components can also be thought of as recurrent nodes. If a random walker enters the attractor containing the node, then the node will be visited infinitely often. To obtain induced subgraphs on each component use: ``(G.subgraph(c).copy() for c in attracting_components(G))`` Parameters ---------- G : DiGraph, MultiDiGraph The graph to be analyzed. Returns ------- attractors : generator of sets A generator of sets of nodes, one for each attracting component of G. Raises ------ NetworkXNotImplemented If the input graph is undirected. See Also -------- number_attracting_components is_attracting_component rN)listnxstrongly_connected_components condensation out_degree)GscccGns f/var/www/django_project/virt/lib/python3.12/site-packages/networkx/algorithms/components/attracting.pyrr sWJ r//2 3C C B  == q a&Ls AA Ac8tdt|DS)aReturns the number of attracting components in `G`. Parameters ---------- G : DiGraph, MultiDiGraph The graph to be analyzed. Returns ------- n : int The number of attracting components in G. Raises ------ NetworkXNotImplemented If the input graph is undirected. See Also -------- attracting_components is_attracting_component c3 K|]}dyw)N).0acs r z/number_attracting_components..Ss4Rq4s )sumr)rs rrr9s4 4034 44c|tt|}t|dk(rt|dt|k(Sy)aReturns True if `G` consists of a single attracting component. Parameters ---------- G : DiGraph, MultiDiGraph The graph to be analyzed. Returns ------- attracting : bool True if `G` has a single attracting component. Otherwise, False. Raises ------ NetworkXNotImplemented If the input graph is undirected. See Also -------- attracting_components number_attracting_components rrF)r rlen)rrs rrrVs94 #A& 'B 2w!|2a5zSV## r) __doc__networkxr networkx.utils.decoratorsr__all__ _dispatchablerrrrrrr#s9 \"'#'T\"5#56\"#r