To understand what a decorator does, we first have to take a step back and look at some of the things we can do with functions in Python. def get_hello_function(punctuation): ...

Take advantage of caching and the lru_cache decorator to relieve your Python functions from repetitive heavy lifting.

In Python, the mere act of making a function call incurs a relatively large amount of overhead. If some function is called repeatedly in a tight loop, even if it isn’t a long-running function ...

Reassessing the definition of function annotations to restrict their use to type annotations. Providing a specification for what to add to Python 3.5, which Guido suggests be reduced to a minimum.