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<div class="section" id="module-altgraph.GraphAlgo">
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<span id="altgraph-graphalgo-graph-algorithms"></span><h1><a class="reference internal" href="#module-altgraph.GraphAlgo" title="altgraph.GraphAlgo: Basic graphs algoritms"><tt class="xref py py-mod docutils literal"><span class="pre">altgraph.GraphAlgo</span></tt></a> — Graph algorithms<a class="headerlink" href="#module-altgraph.GraphAlgo" title="Permalink to this headline">¶</a></h1>
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<dl class="function">
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<dt id="altgraph.GraphAlgo.dijkstra">
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<tt class="descclassname">altgraph.GraphAlgo.</tt><tt class="descname">dijkstra</tt><big>(</big><em>graph</em>, <em>start</em><span class="optional">[</span>, <em>end</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#altgraph.GraphAlgo.dijkstra" title="Permalink to this definition">¶</a></dt>
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<dd><p>Dijkstra’s algorithm for shortest paths.</p>
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<p>Find shortest paths from the start node to all nodes nearer
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than or equal to the <em>end</em> node. The edge data is assumed to be the edge length.</p>
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<div class="admonition note">
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<p class="first admonition-title">Note</p>
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<p class="last">Dijkstra’s algorithm is only guaranteed to work correctly when all edge lengths are positive.
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This code does not verify this property for all edges (only the edges examined until the end
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vertex is reached), but will correctly compute shortest paths even for some graphs with negative
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edges, and will raise an exception if it discovers that a negative edge has caused it to make a mistake.</p>
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</dd></dl>
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<dl class="function">
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<dt id="altgraph.GraphAlgo.shortest_path">
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<tt class="descclassname">altgraph.GraphAlgo.</tt><tt class="descname">shortest_path</tt><big>(</big><em>graph</em>, <em>start</em>, <em>end</em><big>)</big><a class="headerlink" href="#altgraph.GraphAlgo.shortest_path" title="Permalink to this definition">¶</a></dt>
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<dd><p>Find a single shortest path from the given start node to the given end node.
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The input has the same conventions as <a class="reference internal" href="#altgraph.GraphAlgo.dijkstra" title="altgraph.GraphAlgo.dijkstra"><tt class="xref py py-func docutils literal"><span class="pre">dijkstra()</span></tt></a>. The output is a list
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of the nodes in order along the shortest path.</p>
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title="previous chapter"><tt class="docutils literal"><span class="pre">altgraph.ObjectGraph</span></tt> — Graphs of objecs with an identifier</a></p>
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