我从github下载了distribute-crawler。但我发现它没有用。它给了：
unexpected keyword argument 'settings'
有人知道吗？
完整堆栈跟踪如下：
2017-03-31 15:43:43 [twisted] ERROR: Unhandled error in Deferred:
2017-03-31 15:43:43 [twisted] ERROR: Unhandled Error
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/scrapy/commands/crawl.py", line 57, in run
self.crawler_process.crawl(spname, **opts.spargs)
File "/usr/local/lib/python2.7/dist-packages/scrapy/crawler.py", line 163, in crawl
return self._crawl(crawler, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/scrapy/crawler.py", line 167, in _crawl
d = crawler.crawl(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 1237, in unwindGenerator
return _inlineCallbacks(None, gen, Deferred())
--- <exception caught here> ---
File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 1099, in _inlineCallbacks
result = g.send(result)
File "/usr/local/lib/python2.7/dist-packages/scrapy/crawler.py", line 90, in crawl
six.reraise(*exc_info)
File "/usr/local/lib/python2.7/dist-packages/scrapy/crawler.py", line 72, in crawl
self.engine = self._create_engine()
File "/usr/local/lib/python2.7/dist-packages/scrapy/crawler.py", line 97, in _create_engine
return ExecutionEngine(self, lambda _: self.stop())
File "/usr/local/lib/python2.7/dist-packages/scrapy/core/engine.py", line 70, in __init__
self.scraper = Scraper(crawler)
File "/usr/local/lib/python2.7/dist-packages/scrapy/core/scraper.py", line 71, in __init__
self.itemproc = itemproc_cls.from_crawler(crawler)
File "/usr/local/lib/python2.7/dist-packages/scrapy/middleware.py", line 58, in from_crawler
return cls.from_settings(crawler.settings, crawler)
File "/usr/local/lib/python2.7/dist-packages/scrapy/middleware.py", line 36, in from_settings
mw = mwcls.from_crawler(crawler)
File "/usr/local/lib/python2.7/dist-packages/scrapy/pipelines/media.py", line 51, in from_crawler
pipe = cls.from_settings(crawler.settings)
File "/usr/local/lib/python2.7/dist-packages/scrapy/pipelines/images.py", line 95, in from_settings
return cls(store_uri, settings=settings)
exceptions.TypeError: __init__() got an unexpected keyword argument 'settings'