Python的装饰器（decorator）

# coding=utf-8

"""装饰器：
"""

def deco(func):
"""无参数装饰器，接受一个函数，返回一个新的函数。
"""
    def f(*args, **kwargs):
        print "----", func.__name__
        result = func(*args, **kwargs)
        print "++++", func.__name__
        f.__name__ = func.__name__
        return result

    return f


def deco_params(msg):
"""有参数装饰器，接受一个函数，返回一个无参数装饰器。
"""
    def f(func):
        def f2(*args, **kwargs):
            print ">>>>", msg, func.__name__
            result = func(*args, **kwargs)
            print "<<<<", msg, func.__name__
            return result

        f2.__name__ = func.__name__
        return f2

    return f

@deco
@deco_params("ORANGE")
@deco_params("APPLE")
def f1_test(n):
    print "orange", n

if __name__ == "__main__":
    f1_test(30)

执行结果如下：

D:\ATMP\python>python test02.py
---- f1_test
>>>> ORANGE f1_test
>>>> APPLE f1_test
orange 30
<<<< APPLE f1_test
<<<< ORANGE f1_test
++++ f1_test