title: Append lines of data to a Pandas Dataframe that is not associated with the existing dataframe
body: <p>How to go about adding lines of text to an existing Pandas Dataframe?</p>
  <p>I have saved a pandas dataframe via this command:</p>
  <pre><code>predictionsdf = pd.DataFrame(predictions, columns=['File_name', 'Actual_class', 'pred_class', 'Boom'])
  </code></pre>
  <p>The saved data looks like this:</p>
  <p><a href="https://i.stack.imgur.com/G8qns.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/G8qns.png" alt="enter image description here" /></a></p>
  <p>I wanted to add lines of text like this:</p>
  <pre><code> Total # of Boom detection =  1 from 100 files 
   Percentage of Boom detection from plastic bag pop =  1.0 % 
   Time:  0.43 mins
  </code></pre>
  <p>At the bottom of the dataframe data.</p>
  <p>Can you tell me how to go about appending these lines to the bottom of the dataframe?</p>
  <p>Thanks!</p>