diff --git a/tsplib.py b/tsplib.py
index 3e01ae1..ae1843f 100644
--- a/tsplib.py
+++ b/tsplib.py
@@ -1,13 +1,8 @@
 import sys
 import scipy
 
-def write_segments( segments, size, depth, rounding, fd = sys.stdout,
-        node_coord_section=False, 
-        edge_data_section=False, 
-        edge_weight_section=True, 
-        display_data_section=True ):
-
-    # construct a {coords:id} dictionary
+def segments_to_nodes( segments ):
+    """construct a {coords:id} dictionary and returns (nodes,nb)"""
     nodes = {}
     nb = 0
     for segment in segments:
@@ -15,6 +10,27 @@ def write_segments( segments, size, depth, rounding, fd = sys.stdout,
             if not nodes.has_key(coords):
                 nodes[coords] = nb
                 nb += 1
+    return nodes,nb
+
+
+def write_nodes_simple( nodes, fd = sys.stdout ):
+    """write only the coordinates"""
+    fd.write("%i\n" % len(nodes))
+    nodes_index = nodes.keys()
+    nodes_index.sort()
+    for i in nodes_index:
+        x,y = nodes[i]
+        fd.write( "%f %f\n" % (x,y))
+
+
+
+def write_segments( segments, size, depth, rounding, fd = sys.stdout,
+        node_coord_section=False, 
+        edge_data_section=False, 
+        edge_weight_section=True, 
+        display_data_section=True ):
+    
+    nodes,nb = segments_to_nodes(segments)
 
     fd.write( "NAME : penrose3_%i\n" % depth)
     fd.write("COMMENT : Rhombus Penrose tiling (type P3) as generated by a L-system, at depth %i\n" % depth)
@@ -62,8 +78,13 @@ def write_segments( segments, size, depth, rounding, fd = sys.stdout,
     if display_data_section:
         fd.write("DISPLAY_DATA_SECTION\n")
         fmt = "%"+str(len(str(nb)))+"i %"+str(rounding)+"f %"+str(rounding)+"f\n"
+        sorted_nodes = [0] * len(nodes)
         for x,y in nodes:
-            fd.write(fmt % (nodes[(x,y)],x,y))
+            sorted_nodes[nodes[(x,y)]] = (x,y)
+        for i in xrange(len(sorted_nodes)):
+            x,y = sorted_nodes[i]
+            fd.write(fmt % (i,x,y))
+
 
     fd.write("EOF\n")
 
@@ -76,6 +97,14 @@ def read_tour_index( fd ):
 
     return map(int, tour)
 
+def read_tour_EO( fd ):
+    line = fd.readline()
+    sol = line.split()
+    tour = sol[2:] # 0=fitness, 1=size, 2+=tour
+
+    return map(int, tour)
+
+
 
 def read_nodes( fd ):
     """Parse a .tsp file and returns a dictionary of nodes, of the form {id:(x,y)}"""
@@ -180,71 +209,55 @@ def plot_segments_tour( segments_1, segments_2 ):
 if __name__=="__main__":
     import sys
 
-#    segments = [
-#            ( (0,0),(0,2) ),
-#            ( (0,2),(2,2) ),
-#            ( (2,2),(2,0) ),
-#            ( (2,0),(0,0) )
-#    ]
-#
-#    filename = "test.tsp"
-#    with open(filename,"w") as fd:
-#        write_segments( segments, fd=fd, size=1, depth=0, rounding=10 )
-#        write_segments( segments, fd=sys.stdout, size=1, depth=0, rounding=10 )
-#
-#    with open(filename,"r") as fd:
-#        nodes = read_nodes( fd )
-#
-#    print "Nodes: id (x, y)"
-#    for idx,node in nodes.items():
-#        print idx,node
-#
-#    with open(filename,"r") as fd:
-#        vertices = read_vertices( fd )
-#
-#    print "Segments: (x1,y1) (x2,y2)"
-#    segments = []
-#    for i1,i2 in vertices:
-#        print nodes[i1],nodes[i2]
-#        segments.append( (nodes[i1],nodes[i2]) )
-#
-#    plot_segments( segments )
-
     finstance = sys.argv[1]
     ftour = sys.argv[2]
 
-    print "Read nodes"
+    print "Read nodes",
+    sys.stdout.flush()
     with open(finstance,"r") as fd:
         nodes = read_nodes( fd )
+    print len(nodes)
    
-    print "Read vertices"
+    with open(finstance+".nodes","w") as fd:
+        write_nodes_simple(nodes,fd)
+
+    print "Read vertices",
+    sys.stdout.flush()
     with open(finstance,"r") as fd:
         vertices = read_vertices( fd )
+    print len(vertices)
 
-    print "Build segments"
+    print "Build segments",
+    sys.stdout.flush()
     segments = []
     for i1,i2 in vertices:
         #print nodes[i1],nodes[i2]
         segments.append( (nodes[i1],nodes[i2]) )
+    print len(segments)
 
 #    print "Plot segments"
 #    plot_segments( segments )
 
 
-    print "Read tour"
+    print "Read tour",
+    sys.stdout.flush()
     with open(ftour,"r") as fd:
-        tour = read_tour_index( fd )
+        #tour = read_tour_index( fd )
+        tour = read_tour_EO( fd )
+    print len(tour)
 
-    print tour
+    #print tour
 
-    print "Build tour segments"
+    print "Build tour segments",
+    sys.stdout.flush()
     tour_segments = []
     for i in xrange(0,len(tour)-1):
         tour_segments.append( ( nodes[tour[i]],nodes[tour[i+1]] ) )
-        print tour_segments[-1]
+        #print tour_segments[-1]
 
     tour_segments.append( ( nodes[tour[i+1]], nodes[tour[0]] ) )
-    print tour_segments[-1]
+    #print tour_segments[-1]
+    print len(tour_segments)
 
     print "Plot tour segments"
     plot_segments_tour( segments, tour_segments )