title: how do i convert a numpy array to pandas dataframe
body: <p>How do i convert a numpy array to a pandas dataframe?</p>
  
  <p>for example:</p>
  
  <pre><code>test = np.array([[1,2],[2,3]])
  test2 = np.array([[2,4],[2,5]])
  </code></pre>
  
  <p>to this:</p>
  
  <pre><code>pd.DataFrame({'test':[[1,2],[2,3]],
                'test2':[[2,4],[2,5]]})
  
       test   test2
  0  [1, 2]  [2, 4]
  1  [2, 3]  [2, 5]
  </code></pre>