title: Why does importing 'comb' from scipy fail when using numpy 1.13.3?
body: <p>I am working on feature selection and classification problems in Google Collab. I was able to execute the program with numpy version 1.11.3. Unfortunately, today I encountered an error using numpy(1.13.3) as scipy no longer supports 1.11.3 in Collab. I was working with numpy 1.11.3 because it just worked for me though it may be old. It seems 'comb' can be no longer imported in the python environment. How can I make this work with newer versions of numpy? Also, how and where do I check for such incompatibility issues for other libraries that may arise in the future?</p>
  
  <p>I tried manually typing 'from scipy.misc import comb' and 'from scipy import comb' but it still doesn't work.</p>
  
  <pre><code>import numpy as np
  from sklearn.feature_selection import SelectPercentile, f_classif
  from time import time
  
  np.seterr(divide='ignore', invalid='ignore');
  selector=SelectPercentile(f_classif , percentile = 8)
  t0 = time()
  X_newDoS = selector.fit_transform(X_DoS,Y_DoS)
  print ('Time =', time() - t0)
  </code></pre>
  
  <p>The error message I got was: "ImportError: cannot import name 'comb'"</p>