Added the python-graph module
http://code.google.com/p/python-graph/
Patch by: Sverre Rabbelier
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<a href="graph-module.html">Package graph</a> ::
Class hypergraph
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class hypergraph</h1><p class="nomargin-top"></p>
<pre class="base-tree">
object --+
|
<strong class="uidshort">hypergraph</strong>
</pre>
<hr />
<p>Hypergraph class.</p>
<p>Hypergraphs are a generalization of graphs where an edge (called
hyperedge) can connect more than two nodes.</p>
<!-- ==================== INSTANCE METHODS ==================== -->
<a name="section-InstanceMethods"></a>
<table class="summary" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
<td align="left" colspan="2" class="table-header">
<span class="table-header">Instance Methods</span></td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>)</span><br />
Initialize a hypergraph.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">number</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#__len__" class="summary-sig-name">__len__</a>(<span class="summary-sig-arg">self</span>)</span><br />
Return the size of the hypergraph when requested by len().</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">string</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#__str__" class="summary-sig-name">__str__</a>(<span class="summary-sig-arg">self</span>)</span><br />
Return a string representing the hypergraph when requested by str()
(or print).</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#add_hyperedge" class="summary-sig-name">add_hyperedge</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">hyperedge</span>)</span><br />
Add given hyperedge to the hypergraph.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#add_hyperedges" class="summary-sig-name">add_hyperedges</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">edgelist</span>)</span><br />
Add given hyperedges to the hypergraph.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#add_node" class="summary-sig-name">add_node</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">node</span>)</span><br />
Add given node to the hypergraph.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#add_nodes" class="summary-sig-name">add_nodes</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">nodelist</span>)</span><br />
Add given nodes to the hypergraph.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">boolean</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#has_node" class="summary-sig-name">has_node</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">node</span>)</span><br />
Return whether the requested node exists.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">list</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#hyperedges" class="summary-sig-name">hyperedges</a>(<span class="summary-sig-arg">self</span>)</span><br />
Return hyperedge list.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#link" class="summary-sig-name">link</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">node</span>,
<span class="summary-sig-arg">hyperedge</span>)</span><br />
Link given node and hyperedge.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">list</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#links" class="summary-sig-name">links</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">obj</span>)</span><br />
Return all objects linked to the given one.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">list</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#nodes" class="summary-sig-name">nodes</a>(<span class="summary-sig-arg">self</span>)</span><br />
Return node list.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#unlink" class="summary-sig-name">unlink</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">node</span>,
<span class="summary-sig-arg">hyperedge</span>)</span><br />
Unlink given node and hyperedge.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#read" class="summary-sig-name">read</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">string</span>,
<span class="summary-sig-arg">fmt</span>=<span class="summary-sig-default"><code class="variable-quote">'</code><code class="variable-string">xml</code><code class="variable-quote">'</code></span>)</span><br />
Read a hypergraph from a string.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">string</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#write" class="summary-sig-name">write</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">fmt</span>=<span class="summary-sig-default"><code class="variable-quote">'</code><code class="variable-string">xml</code><code class="variable-quote">'</code></span>)</span><br />
Write the hypergraph to a string.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">dictionary</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#accessibility" class="summary-sig-name">accessibility</a>(<span class="summary-sig-arg">self</span>)</span><br />
Accessibility matrix (transitive closure).</td>
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</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">dictionary</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#connected_components" class="summary-sig-name">connected_components</a>(<span class="summary-sig-arg">self</span>)</span><br />
Connected components.</td>
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</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">list</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#cut_hyperedges" class="summary-sig-name">cut_hyperedges</a>(<span class="summary-sig-arg">self</span>)</span><br />
Return the cut-hyperedges of the given hypergraph.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">list</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#cut_nodes" class="summary-sig-name">cut_nodes</a>(<span class="summary-sig-arg">self</span>)</span><br />
Return the cut-nodes of the given hypergraph.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type">int</span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="graph.hypergraph-class.html#rank" class="summary-sig-name">rank</a>(<span class="summary-sig-arg">self</span>)</span><br />
Return the rank of the given hypergraph.</td>
<td align="right" valign="top">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td colspan="2" class="summary">
<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
<code>__delattr__</code>,
<code>__getattribute__</code>,
<code>__hash__</code>,
<code>__new__</code>,
<code>__reduce__</code>,
<code>__reduce_ex__</code>,
<code>__repr__</code>,
<code>__setattr__</code>
</p>
</td>
</tr>
</table>
<!-- ==================== PROPERTIES ==================== -->
<a name="section-Properties"></a>
<table class="summary" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
<td align="left" colspan="2" class="table-header">
<span class="table-header">Properties</span></td>
</tr>
<tr>
<td colspan="2" class="summary">
<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
<code>__class__</code>
</p>
</td>
</tr>
</table>
<!-- ==================== METHOD DETAILS ==================== -->
<a name="section-MethodDetails"></a>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
<td align="left" colspan="2" class="table-header">
<span class="table-header">Method Details</span></td>
</tr>
</table>
<a name="__init__"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>)</span>
<br /><em class="fname">(Constructor)</em>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Initialize a hypergraph.</p>
<dl class="fields">
<dt>Overrides:
object.__init__
</dt>
</dl>
</td></tr></table>
</div>
<a name="__len__"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">__len__</span>(<span class="sig-arg">self</span>)</span>
<br /><em class="fname">(Length operator)</em>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Return the size of the hypergraph when requested by len().</p>
<dl class="fields">
<dt>Returns: number</dt>
<dd>Size of the hypergraph.</dd>
</dl>
</td></tr></table>
</div>
<a name="__str__"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">__str__</span>(<span class="sig-arg">self</span>)</span>
<br /><em class="fname">(Informal representation operator)</em>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Return a string representing the hypergraph when requested by str()
(or print).</p>
<dl class="fields">
<dt>Returns: string</dt>
<dd>String representing the hypergraph.</dd>
<dt>Overrides:
object.__str__
</dt>
</dl>
</td></tr></table>
</div>
<a name="add_hyperedge"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">add_hyperedge</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">hyperedge</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Add given hyperedge to the hypergraph.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>hyperedge</code></strong> (hyperedge) - Hyperedge identifier.</li>
</ul></dd>
</dl>
<div class="fields"> <p><strong>Attention:</strong>
While hyperedge-nodes can be of any type, it's strongly recommended
to use only numbers and single-line strings as node identifiers if
you intend to use write().
</p>
</div></td></tr></table>
</div>
<a name="add_hyperedges"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">add_hyperedges</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">edgelist</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Add given hyperedges to the hypergraph.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>edgelist</code></strong> (list) - List of hyperedge-nodes to be added to the graph.</li>
</ul></dd>
</dl>
<div class="fields"> <p><strong>Attention:</strong>
While hyperedge-nodes can be of any type, it's strongly recommended
to use only numbers and single-line strings as node identifiers if
you intend to use write().
</p>
</div></td></tr></table>
</div>
<a name="add_node"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">add_node</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">node</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Add given node to the hypergraph.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>node</code></strong> (node) - Node identifier.</li>
</ul></dd>
</dl>
<div class="fields"> <p><strong>Attention:</strong>
While nodes can be of any type, it's strongly recommended to use
only numbers and single-line strings as node identifiers if you
intend to use write().
</p>
</div></td></tr></table>
</div>
<a name="add_nodes"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">add_nodes</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">nodelist</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Add given nodes to the hypergraph.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>nodelist</code></strong> (list) - List of nodes to be added to the graph.</li>
</ul></dd>
</dl>
<div class="fields"> <p><strong>Attention:</strong>
While nodes can be of any type, it's strongly recommended to use
only numbers and single-line strings as node identifiers if you
intend to use write().
</p>
</div></td></tr></table>
</div>
<a name="has_node"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">has_node</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">node</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Return whether the requested node exists.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>node</code></strong> (node) - Node identifier</li>
</ul></dd>
<dt>Returns: boolean</dt>
<dd>Truth-value for node existence.</dd>
</dl>
</td></tr></table>
</div>
<a name="hyperedges"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">hyperedges</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Return hyperedge list.</p>
<dl class="fields">
<dt>Returns: list</dt>
<dd>List of hyperedges linked to the given node.</dd>
</dl>
</td></tr></table>
</div>
<a name="link"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">link</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">node</span>,
<span class="sig-arg">hyperedge</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Link given node and hyperedge.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>node</code></strong> (node) - Node.</li>
<li><strong class="pname"><code>hyperedge</code></strong> (node) - Hyperedge.</li>
</ul></dd>
</dl>
</td></tr></table>
</div>
<a name="links"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">links</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">obj</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Return all objects linked to the given one.</p>
<p>If given a node, linked hyperedges will be returned. If given a
hyperedge, linked nodes will be returned.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>obj</code></strong> (node or hyperedge) - Object identifier.</li>
</ul></dd>
<dt>Returns: list</dt>
<dd>List of objects linked to the given one.</dd>
</dl>
</td></tr></table>
</div>
<a name="nodes"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">nodes</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Return node list.</p>
<dl class="fields">
<dt>Returns: list</dt>
<dd>Node list.</dd>
</dl>
</td></tr></table>
</div>
<a name="unlink"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">unlink</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">node</span>,
<span class="sig-arg">hyperedge</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Unlink given node and hyperedge.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>node</code></strong> (node) - Node.</li>
<li><strong class="pname"><code>hyperedge</code></strong> (hyperedge) - Hyperedge.</li>
</ul></dd>
</dl>
</td></tr></table>
</div>
<a name="read"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">read</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">string</span>,
<span class="sig-arg">fmt</span>=<span class="sig-default"><code class="variable-quote">'</code><code class="variable-string">xml</code><code class="variable-quote">'</code></span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Read a hypergraph from a string. Nodes and hyperedges specified in the
input will be added to the current graph.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>string</code></strong> (string) - Input string specifying a graph.</li>
<li><strong class="pname"><code>fmt</code></strong> (string) - Input format. Possible formats are:
<ol start="1">
<li>
'xml' - XML (default)
</li>
</ol></li>
</ul></dd>
</dl>
</td></tr></table>
</div>
<a name="write"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">write</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">fmt</span>=<span class="sig-default"><code class="variable-quote">'</code><code class="variable-string">xml</code><code class="variable-quote">'</code></span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Write the hypergraph to a string. Depending of the output format, this
string can be used by read() to rebuild the graph.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>fmt</code></strong> (string) - Output format. Possible formats are:
<ol start="1">
<li>
'xml' - XML (default)
</li>
<li>
'dot' - DOT Language (for GraphViz)
</li>
<li>
'dotclr' - DOT Language, coloured
</li>
</ol></li>
</ul></dd>
<dt>Returns: string</dt>
<dd>String specifying the graph.</dd>
</dl>
</td></tr></table>
</div>
<a name="accessibility"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">accessibility</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Accessibility matrix (transitive closure).</p>
<dl class="fields">
<dt>Returns: dictionary</dt>
<dd>Accessibility information for each node.</dd>
</dl>
</td></tr></table>
</div>
<a name="connected_components"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">connected_components</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Connected components.</p>
<dl class="fields">
<dt>Returns: dictionary</dt>
<dd>Pairing that associates each node to its connected component.</dd>
</dl>
</td></tr></table>
</div>
<a name="cut_hyperedges"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">cut_hyperedges</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Return the cut-hyperedges of the given hypergraph.</p>
<dl class="fields">
<dt>Returns: list</dt>
<dd>List of cut-nodes.</dd>
</dl>
</td></tr></table>
</div>
<a name="cut_nodes"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">cut_nodes</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Return the cut-nodes of the given hypergraph.</p>
<dl class="fields">
<dt>Returns: list</dt>
<dd>List of cut-nodes.</dd>
</dl>
</td></tr></table>
</div>
<a name="rank"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">rank</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
>
</td>
</tr></table>
<p>Return the rank of the given hypergraph.</p>
<dl class="fields">
<dt>Returns: int</dt>
<dd>Rank of graph.</dd>
</dl>
</td></tr></table>
</div>
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