python exceptions.AttributeError:'module'对象没有来自\u settingI的属性'

我将scrapy 0.2与python2.7一起使用

我想知道我现在正在抓取的链接以前是否被抓取过

我搜索了很多，发现了这个例子

我复制了代码并将其放在我的spider文件夹中，并更改了设置，但出现了以下异常：

Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\twisted\internet\defer.py", line 1237, in unwindGenerator
    return _inlineCallbacks(None, gen, Deferred())
  File "C:\Python27\lib\site-packages\twisted\internet\defer.py", line 1099, in _inlineCallbacks
    result = g.send(result)
  File "C:\Python27\lib\site-packages\scrapy-0.20.2-py2.7.egg\scrapy\crawler.py", line 66, in start
    yield self.engine.open_spider(self._spider, self._start_requests())
  File "C:\Python27\lib\site-packages\twisted\internet\defer.py", line 1237, in unwindGenerator
    return _inlineCallbacks(None, gen, Deferred())
--- <exception caught here> ---
  File "C:\Python27\lib\site-packages\twisted\internet\defer.py", line 1099, in _inlineCallbacks
    result = g.send(result)
  File "C:\Python27\lib\site-packages\scrapy-0.20.2-py2.7.egg\scrapy\core\engine.py", line 221, in open_spider
    scheduler = self.scheduler_cls.from_crawler(self.crawler)
  File "C:\Python27\lib\site-packages\scrapy-0.20.2-py2.7.egg\scrapy\core\scheduler.py", line 25, in from_crawler
    dupefilter = dupefilter_cls.from_settings(settings)
exceptions.AttributeError: 'module' object has no attribute 'from_settings'

在设置中，我添加了以下内容：

DUPEFILTER_CLASS = 'myproject.spiders.CustomFilter'

---

在这里发布你的代码。告诉我们你做了什么。@Bibhas谢谢你的评论。我发布了我的代码你的python路径中有一个名为dupefilter_cls.py的文件吗？@damienfrancois没有我的python文件夹中没有这个文件。但是，我的python文件夹中有这些文件dupefilter.py、dupefilter.pyc、test_dupefilter.py和test_dupefilter.pyc，即c:\python27

DUPEFILTER_CLASS = 'myproject.spiders.CustomFilter'