Python function decorator and closure, python function Decoration

Python function decorator and closure, python function Decoration

Basic knowledge of decorator

The decorator is a callable object, and its parameter is another function (decorated function ). The decorator may process the decorated function and return it, or replace it with another function or callable object.

Assume there is a decorate:

@ Decoratedef target (): pprint ('running target ()')

The effects of the above Code are the same as those described below:

Def target (): print ('running target () ') target = decorate (target)

The final results of the two methods are the same: After the above two code snippets are executed, the target is not necessarily the original target function, but the function returned by decorate (target ).

For example