This talk will briefly go over the various decorator syntaxes before breaking up the common usages of decorators into 5 categories. Effectively, these are design patterns for decorators. The usages to be considered are:
A - Argument Changing Decorators – Decorators that change a function’s arguments, including changing its signature
B - Binding Decorators – Decorators that implement the Descriptor Protocol, such as the builtins: @property, @classmethod, and @staticmethod
C - Control Flow Decorators – Decorators that change when or whether the function will be called, such as @retry or @lrucache
D - Descriptive Decorators – Decorators that do not change the function, but create a reference to it elsewhere, like pytest.mark and flask.app.route
E - Execution Decorators – Decorators that retrieve source code and/or AST and alter it.
I am looking for editors/curators to help with branches of the tree. Please send me an email if you are interested.