As jfm3 points out, you're not going to define new language syntax with decorators. You're also not going to apply them on the spot, inline with other code, sin

As jfm3 points out, you're not going to define new language syntax with decorators. You're also not going to apply them on the spot, inline with other code, since they are defined on a function, and aren't used in the same way as macros are in Lisp. What you can do though is define behavior that varies based on the context. For example in Python you don't have function overloading or types, but with a decorator you can effectively create that type of behavior. So while you're not changing the language, you are changing the semantics of the functions you decorate.