Combinatorial Gray introduction to Gray codes and an overview of alternatives to the binary reflected Gray code, including monotonic and balanced codes.EmailListField for simple Django form field for validating a list of email addresses.Prevent Django newcomments spam with Akismet (reloaded) to use Akismet to prevent comment spam using signals in Django's new commenting system.import contributes to Python.Fixing moved subversion repositories when using to handle repository path changes when migrating from Subversion to Git (even if the noMetadata option is used.)Rails-like MVC Controllers for simple example of grouping views in Django in order to be able to easily override functionality.Using Akismet/TypePad AntiSpam with Django's new comments Django manager that excludes nice thing about Django Django settings context ChoiceField with "other"