Scrapy:Python 找不到蜘蛛 [英] Scrapy: Python cannot find the spider

问题描述

我正在尝试按照 Scrapy 教程进行操作，但我被困在第一步中.我想我已经正确地创建了蜘蛛:

I'm trying to follow the Scrapy tutorial, but I'm stuck in one of the first step. I think I have correctly created the spider:

class dmoz(BaseSpider):
    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]
    open(filename, 'wb').write(response.body)

我已经从 IDLE-shell 中保存了它(作为 dmoz_spider.py)，在给定的文件夹中输入 .py 扩展名，该文件夹与终端窗口的目录相对应.

I have saved that (as dmoz_spider.py) from the IDLE-shell typing the .py extension in a given folder, which corresponds with the directory of the terminal window.

但是，当我输入 scrapy crawl dmoz 时，我得到了这个:

However, when I type scrapy crawl dmoz I get this:

2013-08-09 19:18:06+0200 [scrapy] INFO: Scrapy 0.16.5 started (bot: dmoz)
2013-08-09 19:18:07+0200 [scrapy] DEBUG: Enabled extensions: LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, SpiderState
2013-08-09 19:18:08+0200 [scrapy] DEBUG: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, RedirectMiddleware, CookiesMiddleware, HttpCompressionMiddleware, ChunkedTransferMiddleware, DownloaderStats
2013-08-09 19:18:08+0200 [scrapy] DEBUG: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
2013-08-09 19:18:08+0200 [scrapy] DEBUG: Enabled item pipelines: 
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/2.7/bin/scrapy", line 5, in <module>
    pkg_resources.run_script('Scrapy==0.16.5', 'scrapy')
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources.py", line 499, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources.py", line 1235, in run_script
    execfile(script_filename, namespace, namespace)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Scrapy-0.16.5-py2.7.egg/EGG-INFO/scripts/scrapy", line 4, in <module>
    execute()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Scrapy-0.16.5-py2.7.egg/scrapy/cmdline.py", line 131, in execute
    _run_print_help(parser, _run_command, cmd, args, opts)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Scrapy-0.16.5-py2.7.egg/scrapy/cmdline.py", line 76, in _run_print_help
    func(*a, **kw)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Scrapy-0.16.5-py2.7.egg/scrapy/cmdline.py", line 138, in _run_command
    cmd.run(args, opts)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Scrapy-0.16.5-py2.7.egg/scrapy/commands/crawl.py", line 43, in run
    spider = self.crawler.spiders.create(spname, **opts.spargs)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Scrapy-0.16.5-py2.7.egg/scrapy/spidermanager.py", line 43, in create
    raise KeyError("Spider not found: %s" % spider_name)
KeyError: 'Spider not found: dmoz'

我不明白哪里出了问题，但鉴于我对编程还很陌生，这可能是一件非常简单的事情.

I cannot understand what is wrong, but given that I'm quite new to programming, it might be a very easy thing.

推荐答案

如果以上解决方案都不起作用 ::

If the above solutions do not work then ::

打开教程文件夹中的settings.py并做如下修改

open the settings.pyin the tutorial folder and make the following changes

BOT_NAME = 'dmoz'

将 'tutorial' 中 BOT_NAME 的名称更改为您在 dmoz_spider.py 文件中明确定义的名称.

Change the name of BOT_NAME from 'tutorial' with the one you have defined explicitly in your dmoz_spider.py file.

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