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+:mod:`altgraph` --- A Python Graph Library
+==================================================
+
+.. module:: altgraph
+   :synopsis: A directional graph for python
+
+altgraph is a fork of `graphlib <http://pygraphlib.sourceforge.net>`_ tailored
+to use newer Python 2.3+ features, including additional support used by the
+py2app suite (modulegraph and macholib, specifically).
+
+altgraph is a python based graph (network) representation and manipulation package.
+It has started out as an extension to the `graph_lib module <http://www.ece.arizona.edu/~denny/python_nest/graph_lib_1.0.1.html>`_
+written by Nathan Denny it has been significantly optimized and expanded.
+
+The :class:`altgraph.Graph.Graph` class is loosely modeled after the `LEDA <http://www.algorithmic-solutions.com/enleda.htm>`_ 
+(Library of Efficient Datatypes)  representation. The library
+includes methods for constructing graphs, BFS and DFS traversals,
+topological sort, finding connected components, shortest paths as well as a number
+graph statistics functions. The library can also visualize graphs
+via `graphviz <http://www.research.att.com/sw/tools/graphviz/>`_.
+
+
+.. exception:: GraphError
+
+   Exception raised when methods are called with bad values of
+   an inconsistent state.