# HG changeset patch
# User Keshav Kini <keshav.kini@gmail.com>
# Date 1337816242 25200
# Node ID adae90472437d40b5e5659caa2d9f3645ed894d4
# Parent 8a3cdded007083c2415a50df16c5ce4e754be179
Formatting, typos, faster casting, dead code
diff git a/sage/graphs/graph_generators.py b/sage/graphs/graph_generators.py
a

b


4203  4203  H.set_pos(pos_dict) 
4204  4204  return H 
4205  4205  
4206   def LjubljanaGraph(self, embedding = 1): 
 4206  def LjubljanaGraph(self, embedding=1): 
4207  4207  r""" 
4208  4208  Returns the Ljubljana Graph. 
4209  4209  
4210   The Ljubljana graph is a bipartite 3regular graph on 112 vertices and 
4211   168 edges. It is not vertextransitive as it has two orbits which are 
4212   also independent sets og size 56. See the :wikipedia:`Wikipedia page on 
4213   the Ljubljana Graph <Ljubljana_graph>`. 
 4210  The Ljubljana graph is a bipartite 3regular graph on 112 
 4211  vertices and 168 edges. It is not vertextransitive as it has 
 4212  two orbits which are also independent sets of size 56. See the 
 4213  :wikipedia:`Wikipedia page on the Ljubljana Graph 
 4214  <Ljubljana_graph>`. 
4214  4215  
4215  4216  The default embedding is obtained from the Heawood graph. 
4216  4217  
… 
… 

4255  4256  elif embedding == 2: 
4256  4257  dh = graphs.HeawoodGraph().get_pos() 
4257  4258  
4258   # Correspondance between the vertices of the Heawood Graph and 
 4259  # Correspondence between the vertices of the Heawood Graph and 
4259  4260  # 8sets of the Ljubljana Graph. 
4260  4261  
4261  4262  d = { 
… 
… 

4275  4276  5: [14, 34, 108, 70, 96, 90, 52, 40] 
4276  4277  } 
4277  4278  
4278   # The vertices of each 8set is plotted on a circle, and the circles 
4279   # is slowly shifted to obtain a symmetric drawing. 
 4279  # The vertices of each 8set are plotted on a circle, and the 
 4280  # circles are slowly shifted to obtain a symmetric drawing. 
4280  4281  
4281  4282  for i, (u, vertices) in enumerate(d.iteritems()): 
4282   i = i+0. 
4283   _circle_embedding(g, vertices, center=dh[u], radius=.1, shift=8*i/14) 
 4283  _circle_embedding(g, vertices, center=dh[u], radius=.1, 
 4284  shift=8.*i/14) 
4284  4285  
4285  4286  return g 
 4287  
4286  4288  else: 
4287  4289  raise ValueError("The value of embedding must be 1 or 2.") 
4288  4290  
4289   return g 
4290   
4291  4291  def KneserGraph(self,n,k): 
4292  4292  r""" 
4293  4293  Returns the Kneser Graph with parameters `n, k`. 