._site

some cleanup

diff --git a/sim.py b/sim.py
--- a/sim.py
+++ b/sim.py
@@ -178,12 +178,18 @@ def fold(net, num=100):
             checkfold(target, prev, net)
     return routelengths
 
+def distances(target, nodelist):
+    """calculate the distances between the target and the given list of nodes."""
+    lengths = []
+    for n in nodelist:
+        lengths.append(dist(n,target))
+    return lengths
+
 def linklengths(net):
     """calculate the lengths of all links"""
     lengths = []
     for node, targets in net.items():
-        for t in targets:
-            lengths.append(dist(t, node))
+        lengths.extend(distances(node, targets))
     return lengths
 
 if __name__ == "__main__":