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Package pygraph
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<!-- ==================== PACKAGE DESCRIPTION ==================== -->
<h1 class="epydoc">Package pygraph</h1><p class="nomargin-top"></p>
<p><b>python-graph</b></p>
<p>A library for working with graphs in Python.</p>
<hr />
<div class="fields"> <p><strong>Version:</strong>
1.8.2
<p><a href="pygraph.classes-module.html" class="link">Data
structure</a> classes are located at
<code>pygraph.classes</code>.</p>
<p><a href="pygraph.classes.exceptions-module.html"
class="link">Exception</a> classes are located at
<code>pygraph.classes.exceptions</code>.</p>
<p><a href="pygraph.algorithms.filters-module.html"
class="link">Search filters</a> are located at
<code>pygraph.algorithms.filters</code>.</p>
<p><a href="pygraph.algorithms.heuristics-module.html"
class="link">Heuristics</a> for the A* algorithm are exposed in
<code>pygraph.algorithms.heuristics</code>.</p>
<p>A quick introductory example:</p>
<pre class="py-doctest">
<span class="py-prompt">>>> </span><span class="py-comment"># Import the module and instantiate a graph object</span>
<span class="py-prompt">>>> </span><span class="py-keyword">from</span> pygraph.classes.graph <span class="py-keyword">import</span> graph
<span class="py-prompt">>>> </span><span class="py-keyword">from</span> pygraph.algorithms.searching <span class="py-keyword">import</span> depth_first_search
<span class="py-prompt">>>> </span>gr = graph()
<span class="py-prompt">>>> </span><span class="py-comment"># Add nodes</span>
<span class="py-prompt">>>> </span>gr.add_nodes([<span class="py-string">'X'</span>,<span class="py-string">'Y'</span>,<span class="py-string">'Z'</span>])
<span class="py-prompt">>>> </span>gr.add_nodes([<span class="py-string">'A'</span>,<span class="py-string">'B'</span>,<span class="py-string">'C'</span>])
<span class="py-prompt">>>> </span><span class="py-comment"># Add edges</span>
<span class="py-prompt">>>> </span>gr.add_edge((<span class="py-string">'X'</span>,<span class="py-string">'Y'</span>))
<span class="py-prompt">>>> </span>gr.add_edge((<span class="py-string">'X'</span>,<span class="py-string">'Z'</span>))
<span class="py-prompt">>>> </span>gr.add_edge((<span class="py-string">'A'</span>,<span class="py-string">'B'</span>))
<span class="py-prompt">>>> </span>gr.add_edge((<span class="py-string">'A'</span>,<span class="py-string">'C'</span>))
<span class="py-prompt">>>> </span>gr.add_edge((<span class="py-string">'Y'</span>,<span class="py-string">'B'</span>))
<span class="py-prompt">>>> </span><span class="py-comment"># Depth first search rooted on node X</span>
<span class="py-prompt">>>> </span>st, pre, post = depth_first_search(gr, root=<span class="py-string">'X'</span>)
<span class="py-prompt">>>> </span><span class="py-comment"># Print the spanning tree</span>
<span class="py-prompt">>>> </span><span class="py-keyword">print</span> st
<span class="py-output">{'A': 'B', 'C': 'A', 'B': 'Y', 'Y': 'X', 'X': None, 'Z': 'X'}</span></pre>
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<span class="table-header">Submodules</span></td>
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<ul class="nomargin">
<li> <strong class="uidlink"><a href="pygraph.algorithms-module.html">pygraph.algorithms</a></strong>: <em class="summary">Algorithms</em>
<ul>
<li> <strong class="uidlink"><a href="pygraph.algorithms.accessibility-module.html">pygraph.algorithms.accessibility</a></strong>: <em class="summary">Accessibility algorithms.</em> </li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.critical-module.html">pygraph.algorithms.critical</a></strong>: <em class="summary">Critical path algorithms and transitivity detection algorithm.</em> </li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.cycles-module.html">pygraph.algorithms.cycles</a></strong>: <em class="summary">Cycle detection algorithms.</em> </li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.filters-module.html">pygraph.algorithms.filters</a></strong>: <em class="summary">Set of searching filters.</em>
<ul>
<li> <strong class="uidlink"><a href="pygraph.algorithms.filters.find-module.html">pygraph.algorithms.filters.find</a></strong>: <em class="summary">Search filter for finding a specific node.</em> </li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.filters.null-module.html">pygraph.algorithms.filters.null</a></strong>: <em class="summary">Null searching filter.</em> </li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.filters.radius-module.html">pygraph.algorithms.filters.radius</a></strong>: <em class="summary">Radial search filter.</em> </li>
</ul>
</li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.generators-module.html">pygraph.algorithms.generators</a></strong>: <em class="summary">Random graph generators.</em> </li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.heuristics-module.html">pygraph.algorithms.heuristics</a></strong>: <em class="summary">Set of search heuristics.</em>
<ul>
<li> <strong class="uidlink"><a href="pygraph.algorithms.heuristics.chow-module.html">pygraph.algorithms.heuristics.chow</a></strong>: <em class="summary">Edmond Chow's heuristic for A*.</em> </li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.heuristics.euclidean-module.html">pygraph.algorithms.heuristics.euclidean</a></strong>: <em class="summary">A* heuristic for euclidean graphs.</em> </li>
</ul>
</li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.minmax-module.html">pygraph.algorithms.minmax</a></strong>: <em class="summary">Minimization and maximization algorithms.</em> </li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.pagerank-module.html">pygraph.algorithms.pagerank</a></strong>: <em class="summary">PageRank algoritm</em> </li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.searching-module.html">pygraph.algorithms.searching</a></strong>: <em class="summary">Search algorithms.</em> </li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.sorting-module.html">pygraph.algorithms.sorting</a></strong>: <em class="summary">Sorting algorithms.</em> </li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.traversal-module.html">pygraph.algorithms.traversal</a></strong>: <em class="summary">Traversal algorithms.</em> </li>
<li> <strong class="uidlink"><a href="pygraph.algorithms.utils-module.html">pygraph.algorithms.utils</a></strong>: <em class="summary">Miscellaneous useful stuff.</em> </li>
</ul>
</li>
<li> <strong class="uidlink"><a href="pygraph.classes-module.html">pygraph.classes</a></strong>: <em class="summary">Data structure classes.</em>
<ul>
<li> <strong class="uidlink"><a href="pygraph.classes.digraph-module.html">pygraph.classes.digraph</a></strong>: <em class="summary">Digraph class</em> </li>
<li> <strong class="uidlink"><a href="pygraph.classes.exceptions-module.html">pygraph.classes.exceptions</a></strong>: <em class="summary">Exceptions.</em> </li>
<li> <strong class="uidlink"><a href="pygraph.classes.graph-module.html">pygraph.classes.graph</a></strong>: <em class="summary">Graph class</em> </li>
<li> <strong class="uidlink"><a href="pygraph.classes.hypergraph-module.html">pygraph.classes.hypergraph</a></strong>: <em class="summary">Hypergraph class</em> </li>
</ul>
</li>
<li> <strong class="uidlink"><a href="pygraph.mixins-module.html">pygraph.mixins</a></strong>: <em class="summary">Mixins.</em>
<ul>
<li> <strong class="uidlink"><a href="pygraph.mixins.basegraph-module.html">pygraph.mixins.basegraph</a></strong> </li>
<li> <strong class="uidlink"><a href="pygraph.mixins.common-module.html">pygraph.mixins.common</a></strong> </li>
<li> <strong class="uidlink"><a href="pygraph.mixins.labeling-module.html">pygraph.mixins.labeling</a></strong> </li>
</ul>
</li>
<li> <strong class="uidlink"><a href="pygraph.readwrite-module.html">pygraph.readwrite</a></strong>: <em class="summary">Readwrite algorithms.</em>
<ul>
<li> <strong class="uidlink"><a href="pygraph.readwrite.markup-module.html">pygraph.readwrite.markup</a></strong>: <em class="summary">Functions for reading and writing graphs in a XML markup.</em> </li>
</ul>
</li>
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