title: Python: converting tuple into 2D array
body: <p>I want to convert tuple like</p>
  
  <pre><code>t = [(4,10),(9,7),(11,2),(2,2)]
  </code></pre>
  
  <p>into 2D array like:</p>
  
  <pre><code>a = [[4,10],[9,7],[11,2],[2,2]]
  </code></pre>
  
  <p>I tried</p>
  
  <pre><code>a = []
  for i in t:  
      a.append(np.asarray(i))
  print a
  </code></pre>
  
  <p>is there any easier way?</p>