title: Converting a list of tuples to a Pandas series
body: <p>I have a list of tuples which I want to convert to a Series.  </p>
  
  <pre><code>return array2
  
  [(0, 0.07142857142857142),
    (0, 0.07142857142857142),
    (1, 0.08333333333333333),
    (1, 0.3333333333333333),
    (1, 0.3333333333333333),
    (1, 0.08333333333333333),
    (3, 0.058823529411764705),
    (3, 0.058823529411764705)]
  </code></pre>
  
  <p>I attempt to do this by converting the list to a dictionary and then to a Series:</p>
  
  <pre><code> a = pd.Series(dict(array2))
  </code></pre>
  
  <p>The resulting Series however, doesn't behave as I need it to.  It seems to drop <code>key:value</code> pairs (possibly arbitrarily?)</p>
  
  <p>E.g.</p>
  
  <pre><code>return a
  
   0    0.071429
   1    0.083333
   3    0.058824
  </code></pre>
  
  <p>How would I obtain a series without dropping any key value pairs?</p>