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Demo of decorators usage in Python
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| def function_decorator(f): | |
| print('decorating {}'.format(f.__name__)) | |
| def wrapper(*args, **kwargs): | |
| print('calling {}'.format(f.__name__)) | |
| return wrapper | |
| @function_decorator | |
| def decorated_function(): | |
| print('actual call') | |
| decorated_function() | |
| decorated_function() | |
| class class_decorator(): | |
| def __init__(self, clazz): | |
| self.clazz = clazz | |
| print('decorating {}'.format(clazz)) | |
| def __call__(self): | |
| print('creating an instance of {}'.format(self.clazz)) | |
| return self.clazz() | |
| @class_decorator | |
| class DecoratedClass(): | |
| @function_decorator | |
| def decorated_method(self): | |
| print('called class decorated method') | |
| dc = DecoratedClass() | |
| dc.decorated_method() | |
| @class_decorator | |
| def class_decorated_function(): | |
| print('actual call') | |
| class_decorated_function() |
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