--- cdg/__init__.py.orig	2017-07-20 18:17:28 UTC
+++ cdg/__init__.py
@@ -31,11 +31,11 @@ def load(stream, filename):
         cg = yaml.load(stream, Loader=Loader)
 
     else:
-        raise ValueError, 'Unhandled file type: %s' % filename
+        raise ValueError('Unhandled file type: %s' % filename)
 
     graph = networkx.DiGraph(comment='Callgraph of %s' % filename)
 
-    for (name, props) in cg['functions'].items():
+    for (name, props) in list(cg['functions'].items()):
         graph.add_node(name)
 
         for (k, v) in props['attributes'] if 'attributes' in props else []: