title: How to round the Timestamp to the nearest seconds?
body: <p>Pls help me to round this Timestamp to seconds
  I have the Dataframe Index is the series of the timestamp as below. How to round Index to the nearest second?</p>
  
  <pre><code>Timestamp('2019-06-16 07:53:32.961000')
  </code></pre>
  
  <p>Expected result</p>
  
  <pre><code>Timestamp('2019-06-16 07:53:33')
  </code></pre>