http://code.activestate.com/recipes/tags/classes-mixins-functions/2014-12-22T23:38:38-08:00ActiveState Code Recipes2014-12-22T23:38:38-08:00Lance Spencehttp://code.activestate.com/recipes/users/4191386/http://code.activestate.com/recipes/578988-money-game/

<p style="color: grey"> Python recipe 578988 by <a href="/recipes/users/4191386/">Lance Spence</a> (<a href="/recipes/tags/classes/">classes</a>, <a href="/recipes/tags/games/">games</a>). </p> <p>I created this simple program as a possible start to something larger while I continue to learn Python. It's a simple program that can be used to help young kids learn to count change in US currency.</p>

2012-05-30T10:00:21-07:00Evert van de Waalhttp://code.activestate.com/recipes/users/4182118/http://code.activestate.com/recipes/578137-tracking-child-classes/

<p style="color: grey"> Python recipe 578137 by <a href="/recipes/users/4182118/">Evert van de Waal</a> (<a href="/recipes/tags/child/">child</a>, <a href="/recipes/tags/classes/">classes</a>). </p> <p>This recipe allows a base class to keep track of the child classes that inherit from it using a metaclass.</p>

2011-08-12T23:35:45-07:00Eric Snowhttp://code.activestate.com/recipes/users/4177816/http://code.activestate.com/recipes/577761-simple-abstract-constants-to-use-when-abstractprop/

<p style="color: grey"> Python recipe 577761 by <a href="/recipes/users/4177816/">Eric Snow</a> (<a href="/recipes/tags/attributes/">attributes</a>, <a href="/recipes/tags/classes/">classes</a>). </p> <p>Use these instead of abstract properties when you don't plan on the abstract attribute being implemented with a property. And you can still give your attribute a docstring!</p>

2011-06-11T08:31:09-07:00Steven D'Apranohttp://code.activestate.com/recipes/users/4172944/http://code.activestate.com/recipes/577748-calculate-the-mro-of-a-class/

<p style="color: grey"> Python recipe 577748 by <a href="/recipes/users/4172944/">Steven D'Aprano</a> (<a href="/recipes/tags/c3/">c3</a>, <a href="/recipes/tags/classes/">classes</a>, <a href="/recipes/tags/method/">method</a>, <a href="/recipes/tags/mro/">mro</a>, <a href="/recipes/tags/order/">order</a>, <a href="/recipes/tags/resolution/">resolution</a>). </p> <p>This function allows you to calculate the Method Resolution Order (MRO, or sometimes linearization) of a class or base classes. This is the so-called "C3" algorithm, as used by Python (new-style classes, from version 2.3 and higher). The MRO is the order of base classes that Python uses to search for methods and attributes. For single inheritance, the MRO is obvious and straight-forward and not very exciting, but for multiple inheritance it's not always obvious what the MRO should be.</p>

2011-08-04T21:38:40-07:00Eric Snowhttp://code.activestate.com/recipes/users/4177816/http://code.activestate.com/recipes/577813-make-a-classs-name-available-in-its-definition-bod/

<p style="color: grey"> Python recipe 577813 by <a href="/recipes/users/4177816/">Eric Snow</a> (<a href="/recipes/tags/classes/">classes</a>). </p> <p>Since a class object is created <em>after</em> the body is executed, it can't be available to the class body. Even the name is unavailable, at least by default. However, you can use the <code>__prepare__()</code> method in a metaclass to stick it in there. This recipe is a simple demonstration of how.</p>