title: Regular expressions in SQLalchemy queries?
body: <p>Is it possible to use a regex in a way similar to <code>session.query(MyObject).filter_by(REGEX)</code>?</p>
  
  <p>If not, how can I use sqlAlchemy to retrieve records that have a varchar PK beginning with a certain value (e.g. all those whose <em>city</em> field begins with "SA")? Thanks.</p>