Python中使用装饰器和元编程实现结构体类实例

class Dog < Struct.new(:name,:age)
end

fred = Dog.new("fred",5)
printf "name:%s age:%d",fred.name,fred.age
##name:fred age:5

class Dog(object):
    def __init__(self,name,age):
        self.name = name
        self.age = age

fred = Dog("fred",5)
print('name:{name} age:{age}'.format(name=fred.name,age=fred.age))
##name:fred age:5

def struct(*name):
    """ 装饰器函数
        用途：用于在类定义中，自动设置self.value = value
    """
    def decorator(func):
        def wrapper(*args,**kw):
            for i in range(len(name)):
                setattr(args[0],name[i],args[i+1])
            return func(*args,**kw)
        return wrapper
    return decorator

class Dog(object):
    @struct('name','age')   #黑魔法所在!
    def __init__(self,*all_value):
        pass

fred = Dog("fred",age=fred.age))
##name:fred age:5