Django is a high-level web application framework that loosely follows
 the model-view-controller design pattern.
 .
 The ‘django-model-utils’ library provides some mixins and utilities
 for Django:
 .
  * QueryManager: one-line definition of Managers returning a
    custom QuerySet.
  * InheritanceCastModel: more efficient use of model inheritance
  * TimeStampedModel: self-updating ‘created’ and ‘modified’ fields.
 .
 This package installs the library for Python 3.