title: Sqlalchemy array_length function
body: <p>Does SQLALCHEMY has a function to be used in queries for array_length?</p>
  
  <p>ie: </p>
  
  <pre><code>ssn.query(models.MedicationLog.dose_date,
                           func.array_length(models.MedicationLog.
                                      dose_taken_times).label('dose_taken_times'))
  </code></pre>