装饰器和元类哪个先执行

def deco(function):
    print 'i am in deco'
    return function

class MetaClass(type):
    def __init__(cls,name,bases,attr):
        print 'i am in MetaClass'

class Home(object):
    __metaclass__ = MetaClass

    @deco
    def index(self):
        print 'i am in index'

Home()
# i am in deco
# i am in MetaClass