title: How to shuffle only row index in numpy arrays?
body: <p>I have two numpy arrays.I want to shuffle only their row index simultaneously. Although I equalize their row index then when i shuffle a why it doesn't automatically shuffled b   </p>
  
  <pre><code> a = np.arange(100).reshape(10,10)
   b = np.arange(10).reshape(10,1)
   a.shape[0]==b.shape[0]
   np.random.shuffle(a)
   print a
   print b
  </code></pre>