Decorator
Decorator execution order
- Execution order: outermost first
- Return order: innermost first
Example:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | def make_bold(fn): def wrapper(): print('bold called') return fn() + ' bold' return wrapper def make_italic(fn): def wrapper(): print('italic called') return fn() + ' italic' return wrapper @make_bold @make_italic def hello(): # make_bold will be called first # make_italic will return first print('hello called') return "hello" print(hello()) |
Output:
1 2 3 4 | bold called italic called hello called <b><i>hello</i></b> |