title: Cannot index date in Pandas Data Frame from read_csv
body: <p>I came across a problem today that I unable to solve.
  I read a csv file using</p>
  
  <pre><code>mydata = pd.read_csv(file_name, header=0, sep=",", index_col=[0], parse_dates=True)
  </code></pre>
  
  <p>the CSV looks like:</p>
  
  <pre><code>2009-12-10,5,6,7,8,9  
  2009-12-11,7,6,6,7,9
  </code></pre>
  
  <p>instead of getting an indexed dataframe i get the following output</p>
  
  <pre><code>print mydata
  
  Empty DataFrame
  Columns: []
  Index: [2009-12-10,5,6,7,8,9 2009-12-11,7,6,6,7,9]
  </code></pre>
  
  <p>Please help!! I have been trying for 2 hours now!</p>
  
  <p>Many thanks</p>