python decorator装饰器测试: 装饰器在代码加载时就会执行! 最简单的装饰器就是将函数直接返回(dummyDecorator)

decorator_test.py

# -*- coding: utf-8 -*-

def dummy_decorator(injection):
	print 'dummy'
	return injection

def test_decorator(injection):
	print 'foooo'
	def wrapper(params):
		print 'barrrr'
		return injection(params)
	return wrapper

@dummy_decorator
@test_decorator
def demo(params):
	pass

if __name__ == '__main__':
	pass


# output:
# foooo
# dummy