我阅读了一段非常干净的http://mrcoles.com/blog/3-decorator-examples-and-awesome-python/代码，但是它初始化的方式让我很困惑。我看到这个类装饰器接受了“object”，但是当它运行init时，它把view_func扔到了自己身上。view_func除了init之外没有在任何地方声明，如果它子类化了object，它怎么知道view_func是它正在装饰的整个函数，而那个请求是HTTP请求？

from functools import wraps

class my_decorator(object):

   def __init__(self, view_func):
        self.view_func = view_func
        wraps(view_func)(self)

    def __call__(self, request, *args, **kwargs):
        # maybe do something before the view_func call
        response = self.view_func(request, *args, **kwargs)
        # maybe do something after the view_func call
        return response

# how to use it...
def foo(request): return HttpResponse('...')
foo = my_decorator(foo)

# or...
@my_decorator
def foo(request): return HttpResponse('...')

它确实有效，我只是不知道它到底是如何工作的。在我的logger.py：

class log_decorator(object):
    logpath = "/home/me/logs"

    def __init__(self, func):
        self.func = func
        wraps(func)(self)

    def __call__(self, *args, **kwargs):
        this_path = "{}/{}".format(logpath, self.func.__name__)
        ret = self.func(*args, **kwargs)
        open(this_path, 'w').close()

        if ret:
            with open(this_path, 'a') as myfile:
                myfile.write("Arguments were: {}, {}\n".format(args, kwargs))
                for line in ret:
                    l = str(line)
                    myfile.write(l)
                    myfile.write('\n')
            myfile.close()
        return ret

科尔先生基于类的风格帮助我将任何函数的最新输出写入日志记录器中以该函数命名的文件，只需

@log_decorator
def smash_lines(lines):

我的确切问题是，如果这个类是扩展对象并且不需要这些参数，那么它如何知道view_func和request是什么？基于类的装饰器如何初始化它们自己？谢谢