Scrapy入门教程--调试问题

在学Scrapy框架的过程中遇到的问题进行记录，方便以后查阅！！！

安装完Scrapy后我学习Scrapy的入门教程：Scrapy入门教程

根据教程所提供的代码进行调试，代码如下：

items.py

import scrapy

class DmozItem(scrapy.Item):
    title = scrapy.Field()
    link = scrapy.Field()
    desc = scrapy.Field()

dmoz_spider.py

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)

在进入项目的根目录，执行下列命令启动spider:

scrapy crawl dmoz

后因为问题打断了：

[twisted] CRITICAL: Unhandled error in Deferred

百度google过都没有给出直接原因，但大方向是因为我的环境是win10 64位机器下的pywin32包的问题，但反复安装64位的安装包都没解决的了。

后来再仔细阅读了pywin32关于如何选择包的提示，原来跟当前安装的Python版本有关。python 64位和32位在64位机器下都可以跑，只是安装包时要选跟python版本一致的，而不是跟机器一致。

所以我重新安装了pywin32-220.win32-py2.7.exe 库！

再重新编译后通过了，如下：

2016-11-01 05:59:22 [scrapy] INFO: Scrapy 1.2.1 started (bot: tutorial)
2016-11-01 05:59:22 [scrapy] INFO: Overridden settings: {\'NEWSPIDER_MODULE\': \'tutorial.spiders\', \'SPIDER_MODULES\': [\'tutorial.spiders\'], \'ROBOTSTXT_OBEY\': True, \'BOT_NAME\': \'tutorial\'}
2016-11-01 05:59:22 [scrapy] INFO: Enabled extensions:
[\'scrapy.extensions.logstats.LogStats\',
 \'scrapy.extensions.telnet.TelnetConsole\',
 \'scrapy.extensions.corestats.CoreStats\']
2016-11-01 05:59:23 [scrapy] INFO: Enabled downloader middlewares:
[\'scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware\',
 \'scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware\',
 \'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware\',
 \'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware\',
 \'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware\',
 \'scrapy.downloadermiddlewares.retry.RetryMiddleware\',
 \'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware\',
 \'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware\',
 \'scrapy.downloadermiddlewares.redirect.RedirectMiddleware\',
 \'scrapy.downloadermiddlewares.cookies.CookiesMiddleware\',
 \'scrapy.downloadermiddlewares.chunked.ChunkedTransferMiddleware\',
 \'scrapy.downloadermiddlewares.stats.DownloaderStats\']
2016-11-01 05:59:23 [scrapy] INFO: Enabled spider middlewares:
[\'scrapy.spidermiddlewares.httperror.HttpErrorMiddleware\',
 \'scrapy.spidermiddlewares.offsite.OffsiteMiddleware\',
 \'scrapy.spidermiddlewares.referer.RefererMiddleware\',
 \'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware\',
 \'scrapy.spidermiddlewares.depth.DepthMiddleware\']
2016-11-01 05:59:23 [scrapy] INFO: Enabled item pipelines:
[]
2016-11-01 05:59:23 [scrapy] INFO: Spider opened
2016-11-01 05:59:23 [scrapy] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2016-11-01 05:59:23 [scrapy] DEBUG: Telnet console listening on 127.0.0.1:6023
2016-11-01 05:59:24 [scrapy] DEBUG: Crawled (200) <GET http://www.dmoz.org/robots.txt> (referer: None)
2016-11-01 05:59:24 [scrapy] DEBUG: Crawled (200) <GET http://www.dmoz.org/Computers/Programming/Languages/Python/Books/> (referer: None)
2016-11-01 05:59:24 [scrapy] DEBUG: Crawled (200) <GET http://www.dmoz.org/Computers/Programming/Languages/Python/Resources/> (referer: None)
2016-11-01 05:59:25 [scrapy] INFO: Closing spider (finished)
2016-11-01 05:59:25 [scrapy] INFO: Dumping Scrapy stats:
{\'downloader/request_bytes\': 734,
 \'downloader/request_count\': 3,
 \'downloader/request_method_count/GET\': 3,
 \'downloader/response_bytes\': 15997,
 \'downloader/response_count\': 3,
 \'downloader/response_status_count/200\': 3,
 \'finish_reason\': \'finished\',
 \'finish_time\': datetime.datetime(2016, 11, 1, 5, 59, 25, 139000),
 \'log_count/DEBUG\': 4,
 \'log_count/INFO\': 7,
 \'response_received_count\': 3,
 \'scheduler/dequeued\': 2,
 \'scheduler/dequeued/memory\': 2,
 \'scheduler/enqueued\': 2,
 \'scheduler/enqueued/memory\': 2,
 \'start_time\': datetime.datetime(2016, 11, 1, 5, 59, 23, 306000)}
2016-11-01 05:59:25 [scrapy] INFO: Spider closed (finished)

我在根目录下也找到了，生成的两个文件！！！

参考网址：http://blog.csdn.net/u011170540/article/details/48968739