--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/thirdparty/python-graph/examples/ex1.py	Wed Nov 26 23:56:19 2008 +0000
@@ -0,0 +1,65 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2007-2008 Pedro Matiello <pmatiello@gmail.com>
+# License: MIT (see COPYING file)
+
+import sys
+sys.path.append('..')
+import graph
+sys.path.append('/usr/lib/graphviz/python/')
+import gv
+
+# Graph creation
+gr = graph.graph()
+
+# Add nodes and edges
+gr.add_nodes(["Portugal","Spain","France","Germany","Belgium","Netherlands","Italy"])
+gr.add_nodes(["Switzerland","Austria","Denmark","Poland","Czech Republic","Slovakia","Hungary"])
+gr.add_nodes(["England","Ireland","Scotland","Wales"])
+
+gr.add_edge("Portugal", "Spain")
+gr.add_edge("Spain","France")
+gr.add_edge("France","Belgium")
+gr.add_edge("France","Germany")
+gr.add_edge("France","Italy",)
+gr.add_edge("Belgium","Netherlands")
+gr.add_edge("Germany","Belgium")
+gr.add_edge("Germany","Netherlands")
+gr.add_edge("England","Wales")
+gr.add_edge("England","Scotland")
+gr.add_edge("Scotland","Wales")
+gr.add_edge("Switzerland","Austria")
+gr.add_edge("Switzerland","Germany")
+gr.add_edge("Switzerland","France")
+gr.add_edge("Switzerland","Italy")
+gr.add_edge("Austria","Germany")
+gr.add_edge("Austria","Italy")
+gr.add_edge("Austria","Czech Republic")
+gr.add_edge("Austria","Slovakia")
+gr.add_edge("Austria","Hungary")
+gr.add_edge("Denmark","Germany")
+gr.add_edge("Poland","Czech Republic")
+gr.add_edge("Poland","Slovakia")
+gr.add_edge("Poland","Germany")
+gr.add_edge("Czech Republic","Slovakia")
+gr.add_edge("Czech Republic","Germany")
+gr.add_edge("Slovakia","Hungary")
+
+# Draw as PNG
+dot = gr.write(fmt='dot')
+gvv = gv.readstring(dot)
+gv.layout(gvv,'dot')
+gv.render(gvv,'png','europe.png')
+
+# Then, draw the breadth first search spanning tree rooted in Switzerland
+st, order = gr.breadth_first_search(root="Switzerland")
+gst = graph.digraph()
+gst.add_spanning_tree(st)
+
+dot = gst.write(fmt='dot')
+gvv = gv.readstring(dot)
+
+gv.layout(gvv,'dot')
+gv.render(gvv,'png','europe-st.png')
+
+