cast vertices from UVertex to DVertex

petercorke · petercorke · commit e6bcc7dddf85 · 2021-06-27T12:06:32.000+10:00
diff --git a/examples/roads.py b/examples/roads.py
@@ -35,5 +35,5 @@
 
 # turn the vertex parent information into a tree, it's a dict that maps a
 # vertex to its parent.
-tree = DGraph.Dict(parents)
+tree = DGraph.Dict(parents, copy=True)
 tree.showgraph()  # display it via the browser
