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python decorator

1.³£Ó÷½·¨£¬²»´ø²ÎÊý
def decator(func):
    def inner_func(*args):
        args = (i * 2 for i in args)
        return func(*args)
    return inner_func
   
@decator
def add(a, b, c):
    return a + b + c
2.´ø²ÎÊý£º
class Dec(object):
    def __init__(self, i):
        self.i = i
    def __call__(self, func):
        def inner_func(a, b, c):
            return self.i * func(a, b, c)
        return inner_func
   
@Dec(2)
def abc(x, y, z):
    print "function abc"
    print (x, y, z)
    return x + y + z


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