http://code.activestate.com/recipes/users/1056747/2003-08-17T00:57:14-07:00ActiveState Code Recipes2003-03-20T10:54:20-08:00Ulrich Hoffmannhttp://code.activestate.com/recipes/users/1056747/http://code.activestate.com/recipes/190465-generator-for-permutations-combinations-selections/

<p style="color: grey"> Python recipe 190465 by <a href="/recipes/users/1056747/">Ulrich Hoffmann</a> (<a href="/recipes/tags/algorithms/">algorithms</a>). </p> <p>Permutations and combinations are often required in algorithms that do a complete search of the solution space. They are typically rather large so it's best not to compute them entirely but better to lazily generate them. This recipe uses Python 2.2 generators to create appropriate generator objects, that can be use for example as ranges in for loops.</p>

2003-08-17T00:57:14-07:00Ulrich Hoffmannhttp://code.activestate.com/recipes/users/1056747/http://code.activestate.com/recipes/216420-simplified-attribute-accessors-using-overloading/

<p style="color: grey"> Python recipe 216420 by <a href="/recipes/users/1056747/">Ulrich Hoffmann</a> (<a href="/recipes/tags/oop/">oop</a>). </p> <p>This recipe presents an ideom for simplified accessors, that combines typical getter and setter functionality of an attribute into a single overloaded method, that instead of getATTRIBUTE and setATTRIBUTE can now just be called ATTRIBUTE. When called without arguments it acts as a getter and retrieves the attribute's value. When called with arguments, the attribute is set to this value.</p> <p>Uses a neat trick of an exclusive unique value in default arguments.</p>