title: how do I close the engine created by sqlalchemy.ext.sqlsoup
body: <p>I'm using sqlsoup to perform a simple query.
  My question is how do I close the engine ?
  thanks!</p>
  
  <pre><code>import sqlalchemy.ext.sqlsoup as SqlSoup
  
  db = SqlSoup('sqlite:///test.sqlite')
  res = db.people.filter_by(id = 1).all()
  
  return res[0]
  </code></pre>