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Module graph
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<h1 class="epydoc">Module graph</h1><p class="nomargin-top"><span class="codelink"><a href="logilab.common.graph-pysrc.html">source code</a></span></p>
<pre class="literalblock">
Graph manipulation utilities.
(dot generation adapted from pypy/translator/tool/make_dot.py)
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<td><span class="summary-sig"><a name="escape"></a><span class="summary-sig-name">escape</span>(<span class="summary-sig-arg">value</span>)</span><br />
Make <value> usable in a dot file.</td>
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<td><span class="summary-sig"><a name="normalize_node_id"></a><span class="summary-sig-name">normalize_node_id</span>(<span class="summary-sig-arg">nid</span>)</span><br />
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takes a dependency graph dict as arguments and return an ordered tuple of
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<td><span class="summary-sig"><a href="logilab.common.graph-module.html#get_cycles" class="summary-sig-name">get_cycles</a>(<span class="summary-sig-arg">graph_dict</span>,
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given a dictionary representing an ordered graph (i.e.</td>
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generic function taking a simple graph definition as a dictionary, with
node has key associated to a list of nodes directly reachable from it.</td>
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<pre class="literalblock">
takes a dependency graph dict as arguments and return an ordered tuple of
nodes starting with nodes without dependencies and up to the outermost node.
If there is some cycle in the graph, :exc:`UnorderableGraph` will be raised.
Also the given graph dict will be emptied.
</pre>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">get_cycles</span>(<span class="sig-arg">graph_dict</span>,
<span class="sig-arg">vertices</span>=<span class="sig-default">None</span>)</span>
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<pre class="literalblock">
given a dictionary representing an ordered graph (i.e. key are vertices
and values is a list of destination vertices representing edges), return a
list of detected cycles
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<h3 class="epydoc"><span class="sig"><span class="sig-name">has_path</span>(<span class="sig-arg">graph_dict</span>,
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<pre class="literalblock">
generic function taking a simple graph definition as a dictionary, with
node has key associated to a list of nodes directly reachable from it.
Return None if no path exists to go from `fromnode` to `tonode`, else the
first path found (as a list including the destination node at last)
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