21 May 2013 One of the best talks at PyCon 2013 was Gary Barnhardt's Boundaries talk. One aspect of the talk was avoiding mocking by making the data interchange format based around value types. This is distinctly separate from entity types (where the identity of the object is more than the value). The canonical example value types is money. A $5 bill is a value type because it can be evenly exchanged with any other $5 bill. Entity types on the other hand are closely correlated with their iden...
