title: AttributeError: 'module' object has no attribute 'Spider'
body: <p>I just started to learn scrapy. So I followed the <a href="http://doc.scrapy.org/en/latest/intro/tutorial.html" rel="nofollow">scrapy documentation</a>. I just written the first spider mentioned in that site.</p>
  
  <pre><code>import scrapy
  
  class DmozSpider(scrapy.Spider):
      name = "dmoz"
      allowed_domains = ["dmoz.org"]
      start_urls = [
          "http://www.dmoz.org/Computers/Programming/Languages/Python/Books/",
          "http://www.dmoz.org/Computers/Programming/Languages/Python/Resources/"
      ]
  
      def parse(self, response):
          filename = response.url.split("/")[-2]
          with open(filename, 'wb') as f:
              f.write(response.body)
  </code></pre>
  
  <p>Upon running this <code>scrapy crawl dmoz</code> command on project's root directory, it shows the below error.</p>
  
  <pre><code>2015-06-07 21:53:06+0530 [scrapy] INFO: Scrapy 0.14.4 started (bot: tutorial)
  2015-06-07 21:53:06+0530 [scrapy] DEBUG: Enabled extensions: LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, MemoryUsage, SpiderState
  Traceback (most recent call last):
    File "/usr/bin/scrapy", line 4, in &lt;module&gt;
      execute()
    File "/usr/lib/python2.7/dist-packages/scrapy/cmdline.py", line 132, in execute
      _run_print_help(parser, _run_command, cmd, args, opts)
    File "/usr/lib/python2.7/dist-packages/scrapy/cmdline.py", line 97, in _run_print_help
      func(*a, **kw)
    File "/usr/lib/python2.7/dist-packages/scrapy/cmdline.py", line 139, in _run_command
      cmd.run(args, opts)
    File "/usr/lib/python2.7/dist-packages/scrapy/commands/crawl.py", line 43, in run
      spider = self.crawler.spiders.create(spname, **opts.spargs)
    File "/usr/lib/python2.7/dist-packages/scrapy/command.py", line 34, in crawler
      self._crawler.configure()
    File "/usr/lib/python2.7/dist-packages/scrapy/crawler.py", line 36, in configure
      self.spiders = spman_cls.from_crawler(self)
    File "/usr/lib/python2.7/dist-packages/scrapy/spidermanager.py", line 37, in from_crawler
      return cls.from_settings(crawler.settings)
    File "/usr/lib/python2.7/dist-packages/scrapy/spidermanager.py", line 33, in from_settings
      return cls(settings.getlist('SPIDER_MODULES'))
    File "/usr/lib/python2.7/dist-packages/scrapy/spidermanager.py", line 23, in __init__
      for module in walk_modules(name):
    File "/usr/lib/python2.7/dist-packages/scrapy/utils/misc.py", line 65, in walk_modules
      submod = __import__(fullpath, {}, {}, [''])
    File "/home/avinash/tutorial/tutorial/spiders/dmoz_spider.py", line 3, in &lt;module&gt;
      class DmozSpider(scrapy.Spider):
  AttributeError: 'module' object has no attribute 'Spider'
  </code></pre>