title: dictionary with tuple into a dataframe
body: <p>I have a python dictonary with keys as dates and values as tuple as shown below. </p>
  
  <pre><code>dct = {'01/24/2017 01:10:23.1230':('a',12),
          '12/25/2016 10:12:45.128':('b',23),
          '11/16/2016 09:39:55.459':('c',45),
          '01/12/2017 15:55:20.783':('d',34)}
  </code></pre>
  
  <p>Wanted to write this into a Dataframe with a constant (userid), something like shown below. </p>
  
  <pre><code>   userid   Date                            value1                value2
  0  123     '01/24/2017 01:10:23.1230'        a                     12
  1  123     '12/25/2016 10:12:45.128'         b                     23
  2  123     '11/16/2016 09:39:55.459'         c                     45
  3  123     '01/12/2017 15:55:20.783'         d                     34
  </code></pre>
  
  <p>tried converting the dictionary to a list or a numpy array to write to Dataframe but the tuple in the dictionary, I am not able to separate them out. Any ideas?</p>