o ]Zh @sfdZddlZddlmZgdZedejddZedejdd Zedejd d Z dS) zAttracting components.N)not_implemented_for)number_attracting_componentsattracting_componentsis_attracting_componentZ undirectedccsBtt|}t||}|D]}||dkr||VqdS)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)listnxZstrongly_connected_componentsZ condensationZ out_degree)GZsccZcGnr X/var/www/auris/lib/python3.10/site-packages/networkx/algorithms/components/attracting.pyr s%  rcCstddt|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 css|]}dVqdS)Nr ).0acr r r Ssz/number_attracting_components..)sumr)rr r r r9srcCs0tt|}t|dkrt|dt|kSdS)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 r rF)rrlen)rrr r r rVs  r) __doc__ZnetworkxrZnetworkx.utils.decoratorsr__all__Z _dispatchablerrrr r r r s  *