imporove nice-voltage experiment

experiments/nice-voltage.py

 #!/usr/bin/python
 
-import sys, os
-sys.path.append(os.path.dirname(__file__) + "/..")
+"""
+  Calculate which members of the graph family from Theorem 7.6
+  are snarks.
+"""
 
+import _experiment
 from itertools import permutations
 from graph_tools.all import *
 import json
@@ -17,14 +20,15 @@ assignment = [0, 0, 0, 0, 0, 0, 0, 2, 2, 0, -2, 0, 0, 0, 1]
 
 Seq = voltage_graph_zn_to_sequence(template, assignment)
 
-for i in range(3, 16):
+if __name__ == "__main__":
+  for i in range(3, 12):
     G = Seq.graph(i).eval(UnderlyingGraph)
     print(json.dumps({
       "i": i,
       "graph": G.sparse6_string()
     }))
 
-#X = Seq.stabilize(EdgeColoring(3))
-#p, l = stabilize_period(X, shift=1)
-#print(p, l, l[p:])
+  X = Seq.stabilize(EdgeColoring(3))
+  p, l = stabilize_period(X, shift=1)
+  print(p, l, l[p:])