title: Invert the matrix values
body: <p>I have a </p>
  
  <pre><code>a=[[1,2,3],[4,5,6],[7,8,9]]
  </code></pre>
  
  <p>I want to print "a" the a like matrix form however like columnwise :</p>
  
  <pre><code> 1 4 7 
   2 5 8
   3 6 9
  </code></pre>
  
  <p>Is there any way to do this?</p>