title: Convert dataframe of one year into a dataframe with 365 columns (one by day)
body: <p>I have a dataframe with time interval of 5 minutes. However all the interval are not present. Example:</p>
  
  <pre><code>Date                Value_1
  ...
  2019-01-01 15:30:00 2.4866
  2019-01-01 15:35:00 2.703
  2019-01-01 15:40:00 0.0
  2019-01-02 09:05:00 8.3087
  2019-01-02 09:10:00 7.5134
  2019-01-02 09:15:00 6.637
  ...
  </code></pre>
  
  <p>I would like to know if there is a simple way or a function (i did not find anything) to have a dataframe of 288 intervals based only by time</p>
  
  <pre><code>00:00:00
  00:05:00
  00:10:00
  ...
  23:50:00
  23:55:00
  </code></pre>
  
  <p>where each column is a day (365 for one year). Finally i would like populate this dataframe with the previous one. If no data is available, it could be a nan or 0.</p>
  
  <p>Thank you.</p>
  
  <p>Edit: change the inital dataframe to consider only one value by date</p>