title: How to strip a pandas datetime of date, hours and seconds
body: <p>How do I remove Date, Hours and Seconds from a pandas datetime, so that I'm left with only the minutes? I have a table of dates in the format:</p>
  
  <pre><code>Date
  2015-04-18 23:33:58
  2015-04-19 14:32:08
  2015-04-20 18:42:44
  2015-04-20 21:41:19
  </code></pre>
  
  <p>and I want:</p>
  
  <pre><code>Date
  33
  32
  42
  41
  </code></pre>
  
  <p>The code I'm trying to use is:</p>
  
  <pre><code>fiveMin['Date'] = fiveMin['Date'] - pd.Timedelta(fiveMin['Date'], unit='s')
  </code></pre>
  
  <p>to remove the seconds, however I'm getting the error:</p>
  
  <pre><code>Value must be Timedelta, string, integer, float, timedelta or convertible
  </code></pre>