title: Pb converting a list of pandas.Series into a numpy array of pandas.Series
body: <p>I would like to convert a list of <code>pandas.Series</code> into a numpy array of <code>pandas.Series</code>. But when I call the array constructor, it also converting my Series.</p>
  
  <pre><code>&gt;&gt;&gt; l = [Series([1,2,3]),Series([4,5,6])]
  &gt;&gt;&gt; np.array(l)
  array([[1, 2, 3],
         [4, 5, 6]], dtype=int64)
  </code></pre>
  
  <p>My list is small (~10 elements), so for <a href="https://stackoverflow.com/questions/22212777/python-pandas-small-series-performances?noredirect=1#comment33725521_22212777">performances issues</a> I would like to avoid to create a pandas.DataFrame.
  Is there an easy workaround?</p>
  
  <p>Thanks in advance</p>