python - scrapy crawler caught exception reading instance data -

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i new python , want use scrapy build web crawler. go through tutorial in http://blog.siliconstraits.vn/building-web-crawler-scrapy/. spider code likes following:

from scrapy.spider         import basespider scrapy.selector         import htmlxpathselector nettuts.items        import nettutsitem scrapy.http        import request  class myspider(basespider):      name         = "nettuts"      allowed_domains    = ["net.tutsplus.com"]      start_urls    = ["http://net.tutsplus.com/"]  def parse(self, response):     hxs     = htmlxpathselector(response)     titles     = hxs.select('//h1[@class="post_title"]/a/text()').extract()     title in titles:         item = nettutsitem()         item["title"] = title         yield item

when launch spider command line: scrapy crawl nettus, has following error:

[boto] debug: retrieving credentials metadata server. 2015-07-05 18:27:17 [boto] error: caught exception reading instance data  traceback (most recent call last):   file "/anaconda/lib/python2.7/site-packages/boto/utils.py", line 210, in retry_url     r = opener.open(req, timeout=timeout)   file "/anaconda/lib/python2.7/urllib2.py", line 431, in open response = self._open(req, data)   file "/anaconda/lib/python2.7/urllib2.py", line 449, in _open '_open', req)   file "/anaconda/lib/python2.7/urllib2.py", line 409, in _call_chain result = func(*args)   file "/anaconda/lib/python2.7/urllib2.py", line 1227, in http_open return self.do_open(httplib.httpconnection, req)  file "/anaconda/lib/python2.7/urllib2.py", line 1197, in do_open raise urlerror(err)  urlerror: <urlopen error [errno 65] no route host> 2015-07-05 18:27:17 [boto] error: unable read instance data, giving

really not know what's wrong. hope help

in settings.py file: add following code settings:

download_handlers = {'s3': none,}


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