title: Question about drop=True in pd.dataframe.reset_index()
body: <p>In a Pandas dataframe, it's possible to reset the index using the <code>reset_index()</code> method.  One optional argument is <code>drop=True</code> which according to the documentation:</p>
  
  <pre><code>drop : bool, default False
      Do not try to insert index into dataframe columns. 
      This resets the index to the default integer index.
  </code></pre>
  
  <p>My question is, what does the first sentence mean?  Will it try to convert an integer index to a new column in my df if I leave if False?</p>
  
  <p>Also, will my row order be preserved or should I also sort to ensure proper ordering?</p>