title: 'float' object has no attribute 'encode'
body: <p>this code is for  indexing and sorting on each cluster to identify which are the top n (I chose n=6) words that are nearest to the cluster centroid. 
  Anyway, i found this kind of error:
  'float' object has no attribute 'encode'</p>
  
  <p>can anyone help me?
  the code is the following:</p>
  
  <pre><code>from __future__ import print_function
  
  print("Top terms per cluster:")
  print()
  #sort cluster centers by proximity to centroid
  order_centroids = km.cluster_centers_.argsort()[:, ::-1] 
  
  for i in range(num_clusters):
      print("Cluster %d words:" % i, end='')
  
      for ind in order_centroids[i, :6]: #replace 6 with n words per cluster
          print(' %s' % vocab_frame.ix[terms[ind].split(' ')].values.tolist()[0][0].encode('utf-8', 'ignore'), end=',')
      print() #add whitespace
      print() #add whitespace
  
      print("Cluster %d titles:" % i, end='')
      for title in frame.ix[i]['title'].values.tolist():
          print(' %s,' % title, end='')
      print() #add whitespace
      print() #add whitespace
  
  print()
  print()
  </code></pre>
  
  <p>thank you in advance</p>