Many Pythonistas are familiar with using decorators, but far fewer understand what’s happening under the hood and can write their own. It takes a little effort to learn their subtleties but ...

While Python has lacked a native syntax for pattern matching ... checkers to verify that matches can be verified. A new @sealed decorator for a class indicates to type checkers that any subclass ...

Updating the properties of a wrapped callable is especially useful when used in a decorator, since the transformed function ends up with properties of the original “bare” function. Under Python 2, ...