<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Components — NetworkX 1.8.1 documentation</title> <link rel="stylesheet" href="../_static/networkx.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../', VERSION: '1.8.1', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: false }; </script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <link rel="search" type="application/opensearchdescription+xml" title="Search within NetworkX 1.8.1 documentation" href="../_static/opensearch.xml"/> <link rel="top" title="NetworkX 1.8.1 documentation" href="../index.html" /> <link rel="up" title="Algorithms" href="algorithms.html" /> <link rel="next" title="is_connected" href="generated/networkx.algorithms.components.connected.is_connected.html" /> <link rel="prev" title="k_clique_communities" href="generated/networkx.algorithms.community.kclique.k_clique_communities.html" /> </head> <body> <div style="color: black;background-color: white; font-size: 3.2em; text-align: left; padding: 15px 10px 10px 15px"> NetworkX </div> <div class="related"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="generated/networkx.algorithms.components.connected.is_connected.html" title="is_connected" accesskey="N">next</a> |</li> <li class="right" > <a 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href="#module-networkx.algorithms.components.strongly_connected">Strong connectivity</a><ul> </ul> </li> <li><a class="reference internal" href="#module-networkx.algorithms.components.weakly_connected">Weak connectivity</a><ul> </ul> </li> <li><a class="reference internal" href="#module-networkx.algorithms.components.attracting">Atrracting components</a><ul> </ul> </li> <li><a class="reference internal" href="#module-networkx.algorithms.components.biconnected">Biconnected components</a><ul> </ul> </li> </ul> </li> </ul> <h4>Previous topic</h4> <p class="topless"><a href="generated/networkx.algorithms.community.kclique.k_clique_communities.html" title="previous chapter">k_clique_communities</a></p> <h4>Next topic</h4> <p class="topless"><a href="generated/networkx.algorithms.components.connected.is_connected.html" title="next chapter">is_connected</a></p> <div id="searchbox" style="display: none"> <h3>Quick search</h3> <form class="search" action="../search.html" method="get"> <input type="text" name="q" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> <p class="searchtip" style="font-size: 90%"> Enter search terms or a module, class or function name. </p> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body"> <div class="section" id="module-networkx.algorithms.components"> <span id="components"></span><h1>Components<a class="headerlink" href="#module-networkx.algorithms.components" title="Permalink to this headline">¶</a></h1> <div class="section" id="module-networkx.algorithms.components.connected"> <span id="connectivity"></span><h2>Connectivity<a class="headerlink" href="#module-networkx.algorithms.components.connected" title="Permalink to this headline">¶</a></h2> <p>Connected components.</p> <table border="1" class="longtable docutils"> <colgroup> <col width="10%" /> <col width="90%" /> </colgroup> <tbody valign="top"> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.connected.is_connected.html#networkx.algorithms.components.connected.is_connected" title="networkx.algorithms.components.connected.is_connected"><tt class="xref py py-obj docutils literal"><span class="pre">is_connected</span></tt></a>(G)</td> <td>Test graph connectivity.</td> </tr> <tr class="row-even"><td><a class="reference internal" href="generated/networkx.algorithms.components.connected.number_connected_components.html#networkx.algorithms.components.connected.number_connected_components" title="networkx.algorithms.components.connected.number_connected_components"><tt class="xref py py-obj docutils literal"><span class="pre">number_connected_components</span></tt></a>(G)</td> <td>Return number of connected components in graph.</td> </tr> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.connected.connected_components.html#networkx.algorithms.components.connected.connected_components" title="networkx.algorithms.components.connected.connected_components"><tt class="xref py py-obj docutils literal"><span class="pre">connected_components</span></tt></a>(G)</td> <td>Return nodes in connected components of graph.</td> </tr> <tr class="row-even"><td><a class="reference internal" href="generated/networkx.algorithms.components.connected.connected_component_subgraphs.html#networkx.algorithms.components.connected.connected_component_subgraphs" title="networkx.algorithms.components.connected.connected_component_subgraphs"><tt class="xref py py-obj docutils literal"><span class="pre">connected_component_subgraphs</span></tt></a>(G)</td> <td>Return connected components as subgraphs.</td> </tr> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.connected.node_connected_component.html#networkx.algorithms.components.connected.node_connected_component" title="networkx.algorithms.components.connected.node_connected_component"><tt class="xref py py-obj docutils literal"><span class="pre">node_connected_component</span></tt></a>(G, n)</td> <td>Return nodes in connected components of graph containing node n.</td> </tr> </tbody> </table> </div> <div class="section" id="module-networkx.algorithms.components.strongly_connected"> <span id="strong-connectivity"></span><h2>Strong connectivity<a class="headerlink" href="#module-networkx.algorithms.components.strongly_connected" title="Permalink to this headline">¶</a></h2> <p>Strongly connected components.</p> <table border="1" class="longtable docutils"> <colgroup> <col width="10%" /> <col width="90%" /> </colgroup> <tbody valign="top"> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.strongly_connected.is_strongly_connected.html#networkx.algorithms.components.strongly_connected.is_strongly_connected" title="networkx.algorithms.components.strongly_connected.is_strongly_connected"><tt class="xref py py-obj docutils literal"><span class="pre">is_strongly_connected</span></tt></a>(G)</td> <td>Test directed graph for strong connectivity.</td> </tr> <tr class="row-even"><td><a class="reference internal" href="generated/networkx.algorithms.components.strongly_connected.number_strongly_connected_components.html#networkx.algorithms.components.strongly_connected.number_strongly_connected_components" title="networkx.algorithms.components.strongly_connected.number_strongly_connected_components"><tt class="xref py py-obj docutils literal"><span class="pre">number_strongly_connected_components</span></tt></a>(G)</td> <td>Return number of strongly connected components in graph.</td> </tr> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.strongly_connected.strongly_connected_components.html#networkx.algorithms.components.strongly_connected.strongly_connected_components" title="networkx.algorithms.components.strongly_connected.strongly_connected_components"><tt class="xref py py-obj docutils literal"><span class="pre">strongly_connected_components</span></tt></a>(G)</td> <td>Return nodes in strongly connected components of graph.</td> </tr> <tr class="row-even"><td><a class="reference internal" href="generated/networkx.algorithms.components.strongly_connected.strongly_connected_component_subgraphs.html#networkx.algorithms.components.strongly_connected.strongly_connected_component_subgraphs" title="networkx.algorithms.components.strongly_connected.strongly_connected_component_subgraphs"><tt class="xref py py-obj docutils literal"><span class="pre">strongly_connected_component_subgraphs</span></tt></a>(G)</td> <td>Return strongly connected components as subgraphs.</td> </tr> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.strongly_connected.strongly_connected_components_recursive.html#networkx.algorithms.components.strongly_connected.strongly_connected_components_recursive" title="networkx.algorithms.components.strongly_connected.strongly_connected_components_recursive"><tt class="xref py py-obj docutils literal"><span class="pre">strongly_connected_components_recursive</span></tt></a>(G)</td> <td>Return nodes in strongly connected components of graph.</td> </tr> <tr class="row-even"><td><a class="reference internal" href="generated/networkx.algorithms.components.strongly_connected.kosaraju_strongly_connected_components.html#networkx.algorithms.components.strongly_connected.kosaraju_strongly_connected_components" title="networkx.algorithms.components.strongly_connected.kosaraju_strongly_connected_components"><tt class="xref py py-obj docutils literal"><span class="pre">kosaraju_strongly_connected_components</span></tt></a>(G[, ...])</td> <td>Return nodes in strongly connected components of graph.</td> </tr> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.strongly_connected.condensation.html#networkx.algorithms.components.strongly_connected.condensation" title="networkx.algorithms.components.strongly_connected.condensation"><tt class="xref py py-obj docutils literal"><span class="pre">condensation</span></tt></a>(G[, scc])</td> <td>Returns the condensation of G.</td> </tr> </tbody> </table> </div> <div class="section" id="module-networkx.algorithms.components.weakly_connected"> <span id="weak-connectivity"></span><h2>Weak connectivity<a class="headerlink" href="#module-networkx.algorithms.components.weakly_connected" title="Permalink to this headline">¶</a></h2> <p>Weakly connected components.</p> <table border="1" class="longtable docutils"> <colgroup> <col width="10%" /> <col width="90%" /> </colgroup> <tbody valign="top"> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.weakly_connected.is_weakly_connected.html#networkx.algorithms.components.weakly_connected.is_weakly_connected" title="networkx.algorithms.components.weakly_connected.is_weakly_connected"><tt class="xref py py-obj docutils literal"><span class="pre">is_weakly_connected</span></tt></a>(G)</td> <td>Test directed graph for weak connectivity.</td> </tr> <tr class="row-even"><td><a class="reference internal" href="generated/networkx.algorithms.components.weakly_connected.number_weakly_connected_components.html#networkx.algorithms.components.weakly_connected.number_weakly_connected_components" title="networkx.algorithms.components.weakly_connected.number_weakly_connected_components"><tt class="xref py py-obj docutils literal"><span class="pre">number_weakly_connected_components</span></tt></a>(G)</td> <td>Return the number of connected components in G.</td> </tr> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.weakly_connected.weakly_connected_components.html#networkx.algorithms.components.weakly_connected.weakly_connected_components" title="networkx.algorithms.components.weakly_connected.weakly_connected_components"><tt class="xref py py-obj docutils literal"><span class="pre">weakly_connected_components</span></tt></a>(G)</td> <td>Return weakly connected components of G.</td> </tr> <tr class="row-even"><td><a class="reference internal" href="generated/networkx.algorithms.components.weakly_connected.weakly_connected_component_subgraphs.html#networkx.algorithms.components.weakly_connected.weakly_connected_component_subgraphs" title="networkx.algorithms.components.weakly_connected.weakly_connected_component_subgraphs"><tt class="xref py py-obj docutils literal"><span class="pre">weakly_connected_component_subgraphs</span></tt></a>(G)</td> <td>Return weakly connected components as subgraphs.</td> </tr> </tbody> </table> </div> <div class="section" id="module-networkx.algorithms.components.attracting"> <span id="atrracting-components"></span><h2>Atrracting components<a class="headerlink" href="#module-networkx.algorithms.components.attracting" title="Permalink to this headline">¶</a></h2> <p>Attracting components.</p> <table border="1" class="longtable docutils"> <colgroup> <col width="10%" /> <col width="90%" /> </colgroup> <tbody valign="top"> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.attracting.is_attracting_component.html#networkx.algorithms.components.attracting.is_attracting_component" title="networkx.algorithms.components.attracting.is_attracting_component"><tt class="xref py py-obj docutils literal"><span class="pre">is_attracting_component</span></tt></a>(G)</td> <td>Returns True if <span class="math">G</span> consists of a single attracting component.</td> </tr> <tr class="row-even"><td><a class="reference internal" href="generated/networkx.algorithms.components.attracting.number_attracting_components.html#networkx.algorithms.components.attracting.number_attracting_components" title="networkx.algorithms.components.attracting.number_attracting_components"><tt class="xref py py-obj docutils literal"><span class="pre">number_attracting_components</span></tt></a>(G)</td> <td>Returns the number of attracting components in <span class="math">G</span>.</td> </tr> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.attracting.attracting_components.html#networkx.algorithms.components.attracting.attracting_components" title="networkx.algorithms.components.attracting.attracting_components"><tt class="xref py py-obj docutils literal"><span class="pre">attracting_components</span></tt></a>(G)</td> <td>Returns a list of attracting components in <span class="math">G</span>.</td> </tr> <tr class="row-even"><td><a class="reference internal" href="generated/networkx.algorithms.components.attracting.attracting_component_subgraphs.html#networkx.algorithms.components.attracting.attracting_component_subgraphs" title="networkx.algorithms.components.attracting.attracting_component_subgraphs"><tt class="xref py py-obj docutils literal"><span class="pre">attracting_component_subgraphs</span></tt></a>(G)</td> <td>Returns a list of attracting component subgraphs from <span class="math">G</span>.</td> </tr> </tbody> </table> </div> <div class="section" id="module-networkx.algorithms.components.biconnected"> <span id="biconnected-components"></span><h2>Biconnected components<a class="headerlink" href="#module-networkx.algorithms.components.biconnected" title="Permalink to this headline">¶</a></h2> <p>Biconnected components and articulation points.</p> <table border="1" class="longtable docutils"> <colgroup> <col width="10%" /> <col width="90%" /> </colgroup> <tbody valign="top"> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.biconnected.is_biconnected.html#networkx.algorithms.components.biconnected.is_biconnected" title="networkx.algorithms.components.biconnected.is_biconnected"><tt class="xref py py-obj docutils literal"><span class="pre">is_biconnected</span></tt></a>(G)</td> <td>Return True if the graph is biconnected, False otherwise.</td> </tr> <tr class="row-even"><td><a class="reference internal" href="generated/networkx.algorithms.components.biconnected.biconnected_components.html#networkx.algorithms.components.biconnected.biconnected_components" title="networkx.algorithms.components.biconnected.biconnected_components"><tt class="xref py py-obj docutils literal"><span class="pre">biconnected_components</span></tt></a>(G)</td> <td>Return a generator of sets of nodes, one set for each biconnected</td> </tr> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.biconnected.biconnected_component_edges.html#networkx.algorithms.components.biconnected.biconnected_component_edges" title="networkx.algorithms.components.biconnected.biconnected_component_edges"><tt class="xref py py-obj docutils literal"><span class="pre">biconnected_component_edges</span></tt></a>(G)</td> <td>Return a generator of lists of edges, one list for each biconnected component of the input graph.</td> </tr> <tr class="row-even"><td><a class="reference internal" href="generated/networkx.algorithms.components.biconnected.biconnected_component_subgraphs.html#networkx.algorithms.components.biconnected.biconnected_component_subgraphs" title="networkx.algorithms.components.biconnected.biconnected_component_subgraphs"><tt class="xref py py-obj docutils literal"><span class="pre">biconnected_component_subgraphs</span></tt></a>(G)</td> <td>Return a generator of graphs, one graph for each biconnected component of the input graph.</td> </tr> <tr class="row-odd"><td><a class="reference internal" href="generated/networkx.algorithms.components.biconnected.articulation_points.html#networkx.algorithms.components.biconnected.articulation_points" title="networkx.algorithms.components.biconnected.articulation_points"><tt class="xref py py-obj docutils literal"><span class="pre">articulation_points</span></tt></a>(G)</td> <td>Return a generator of articulation points, or cut vertices, of a graph.</td> </tr> </tbody> </table> </div> </div> </div> </div> </div> <div class="clearer"></div> </div> <div class="related"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="generated/networkx.algorithms.components.connected.is_connected.html" title="is_connected" >next</a> |</li> <li class="right" > <a 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