title: Using primary key column as index values in Pandas dataframe - Best practice?
body: <p>I'm relatively new to Pandas and I wanted to know best practices around incremental vs. primary key indexes.</p>
  
  <p>In particular, I'm wondering:</p>
  
  <ol>
  <li>what are the benefits of using a dataset's primary key as its DataFrame index, as opposed to just sticking with the default incremental integer index?</li>
  <li>are any potential pitfalls for replacing the default incremental integer index with a dataset's primary key?</li>
  </ol>