title: How to select the indexes of an 2 D array in python?
body: <p>I have a numpy 2D array where cartesian coordinates are stored as follows.</p>
  
  <pre><code>a = [[0,1],[1,1],[2,1],[4,6],[10,3], [2,10]]
  </code></pre>
  
  <p>How can I select all the array indexes to another array where (y cordinate >5)?</p>
  
  <p>Thanks in Advance
  Prasanna</p>