title: Is there something equivalent to django's managers in SQLAlchemy?
body: <p>I have some <a href="http://www.sqlalchemy.org/" rel="noreferrer">SQLAlchemy models</a> (Declarative) and some queries to write like:  </p>
  
  <pre><code>Mymodel.query.filter(Mymodel.myfield=='lambda')
  </code></pre>
  
  <p>Since I have to use the above query several times in my code I would like to do better than repeating it over and over. I know that in <a href="http://www.djangoproject.com/" rel="noreferrer">django</a> you can do it by putting <a href="http://docs.djangoproject.com/en/dev/topics/db/managers/" rel="noreferrer">managers</a> in your models.</p>
  
  <p>Is there something equivalent to django's managers in SQLAlchemy? Or maybe another way to do it?</p>