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2024-04-28 15:20:55 发布

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我有一个关于scrapy的问题，它没有返回任何结果，我不知道问题在哪里

我使用Python版本：2.7.3（Windows 8.164位）

我的项目是由这个命令创建的scrapy startproject craigslist_sample

项目目录：

craigslist_sample/
    scrapy.cfg           

    craigslist_sample/            
        __init__.py

        items.py          

        pipelines.py      

        settings.py       

        spiders/         
            __init__.py
              byub.py

我的蜘蛛文件（byub.py）

    import scrapy

class MySpider(scrapy.Spider):
        name = "craig"
        allowed_domains = ["craigslist.org"]
        start_urls = [
            "http://sfbay.craigslist.org/search/sfc/npo"    ]

        def parse(self, response):
          items = []
          for sel in response.xpath('//p//a[@class="hdrlnk"]'):
               item = CraigslistSampleItem()
               print(  sel.xpath('text()').extract())
               print (sel.xpath('@href').extract())

当我把F5放在上面看我的数据打印出来时，我没有显示任何内容

spider文件夹中的Myinit.py文件：

import sys
sys.path.append("../../craigslist_sample/")

我添加了路径../..craigslist_sample/来调用我的CraigslistSampleItem类

My items.py文件

import scrapy


class CraigslistSampleItem(scrapy.Item):
    # define the fields for your item here like:
    title = scrapy.Field()
    link  = scrapy.Field()

我的日志文件：

2015-06-20 22:34:59 [scrapy] INFO: Scrapy 1.0.0 started (bot: craigslist_sample)
2015-06-20 22:34:59 [scrapy] INFO: Optional features available: ssl, http11
2015-06-20 22:34:59 [scrapy] INFO: Overridden settings: {'NEWSPIDER_MODULE': 'craigslist_sample.spiders', 'SPIDER_MODULES': ['craigslist_sample.spiders'], 'LOG_STDOUT': True, 'LOG_FILE': '/tmp/scrapy_output.txt', 'BOT_NAME': 'craigslist_sample'}
2015-06-20 22:35:00 [scrapy] INFO: Enabled extensions: CloseSpider, TelnetConsole, LogStats, CoreStats, SpiderState
2015-06-20 22:35:00 [scrapy] INFO: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, MetaRefreshMiddleware, HttpCompressionMiddleware, RedirectMiddleware, CookiesMiddleware, ChunkedTransferMiddleware, DownloaderStats
2015-06-20 22:35:00 [scrapy] INFO: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
2015-06-20 22:35:00 [scrapy] INFO: Enabled item pipelines: 
2015-06-20 22:35:00 [scrapy] INFO: Spider opened
2015-06-20 22:35:00 [scrapy] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2015-06-20 22:35:00 [scrapy] DEBUG: Telnet console listening on 127.0.0.1:6023
2015-06-20 22:35:02 [scrapy] DEBUG: Crawled (200) <GET http://sfbay.craigslist.org/search/sfc/npo> (referer: None)
2015-06-20 22:35:02 [stdout] INFO: []
2015-06-20 22:35:02 [stdout] INFO: [u'/sfc/npo/5083113578.html']
2015-06-20 22:35:02 [stdout] INFO: []
2015-06-20 22:35:02 [stdout] INFO: [u'/sfc/npo/5083098605.html']
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2015-06-20 22:35:02 [stdout] INFO: []
2015-06-20 22:35:02 [stdout] INFO: []
2015-06-20 22:35:02 [scrapy] INFO: Closing spider (finished)
2015-06-20 22:35:02 [scrapy] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 232,
 'downloader/request_count': 1,
 'downloader/request_method_count/GET': 1,
 'downloader/response_bytes': 15530,
 'downloader/response_count': 1,
 'downloader/response_status_count/200': 1,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2015, 6, 20, 20, 35, 2, 312000),
 'log_count/DEBUG': 2,
 'log_count/INFO': 209,
 'response_received_count': 1,
 'scheduler/dequeued': 1,
 'scheduler/dequeued/memory': 1,
 'scheduler/enqueued': 1,
 'scheduler/enqueued/memory': 1,
 'start_time': datetime.datetime(2015, 6, 20, 20, 35, 0, 968000)}
2015-06-20 22:35:02 [scrapy] INFO: Spider closed (finished)
2015-06-20 23:03:37 [scrapy] INFO: Scrapy 1.0.0 started (bot: craigslist_sample)
2015-06-20 23:03:37 [scrapy] INFO: Optional features available: ssl, http11
2015-06-20 23:03:37 [scrapy] INFO: Overridden settings: {'NEWSPIDER_MODULE': 'craigslist_sample.spiders', 'SPIDER_MODULES': ['craigslist_sample.spiders'], 'LOG_STDOUT': True, 'LOG_FILE': '/tmp/scrapy_output.txt', 'BOT_NAME': 'craigslist_sample'}
2015-06-20 23:03:38 [scrapy] INFO: Enabled extensions: CloseSpider, TelnetConsole, LogStats, CoreStats, SpiderState
2015-06-20 23:03:38 [scrapy] INFO: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, MetaRefreshMiddleware, HttpCompressionMiddleware, RedirectMiddleware, CookiesMiddleware, ChunkedTransferMiddleware, DownloaderStats
2015-06-20 23:03:38 [scrapy] INFO: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
2015-06-20 23:03:38 [scrapy] INFO: Enabled item pipelines: 
2015-06-20 23:03:38 [scrapy] INFO: Spider opened
2015-06-20 23:03:38 [scrapy] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2015-06-20 23:03:38 [scrapy] DEBUG: Telnet console listening on 127.0.0.1:6023
2015-06-20 23:03:39 [scrapy] DEBUG: Crawled (200) <GET http://sfbay.craigslist.org/search/sfc/npo> (referer: None)
2015-06-20 23:03:39 [stdout] INFO: []
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2015-06-20 23:03:39 [stdout] INFO: []
2015-06-20 23:03:39 [stdout] INFO: []
2015-06-20 23:03:39 [scrapy] INFO: Closing spider (finished)
2015-06-20 23:03:39 [scrapy] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 232,
 'downloader/request_count': 1,
 'downloader/request_method_count/GET': 1,
 'downloader/response_bytes': 15536,
 'downloader/response_count': 1,
 'downloader/response_status_count/200': 1,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2015, 6, 20, 21, 3, 39, 743000),
 'log_count/DEBUG': 2,
 'log_count/INFO': 209,
 'response_received_count': 1,
 'scheduler/dequeued': 1,
 'scheduler/dequeued/memory': 1,
 'scheduler/enqueued': 1,
 'scheduler/enqueued/memory': 1,
 'start_time': datetime.datetime(2015, 6, 20, 21, 3, 38, 303000)}
2015-06-20 23:03:39 [scrapy] INFO: Spider closed (finished)

谢谢你的帮助


Tags： samplepyinfodatetimeresponsehtmlcountstdout
2条回答
网友
1楼 · 编辑于 2024-04-28 15:20:55

当您在每个<p>中搜索时，会有一个<a>标记，该标记具有url，但其中没有文本。检查网站的HTML。所以您得到了不正确的<a>标记。

我正在用类class="hdrlnk"搜索<a>标记，它有url和文本。

for sel in response.xpath('//p//a[@class="hdrlnk"]'):
    print sel.xpath('text()').extract()
    print sel.xpath('@href').extract()

输出：

[u'Resident Services Coordinator']
[u'/sfc/npo/5083113578.html']
[u'Resident Services Coordinator']
[u'/sfc/npo/5083098605.html']
[u'General Manager - 939/951 Eddy']
[u'/sfc/npo/5083051162.html']
[u'General Manager - 430 Turk']
[u'/sfc/npo/5083044559.html']
....

更新

  1. 我创建了和你一样的项目。（scrapy startproject craigslist_sample）

  2. 我从文件中删除了所有内容spiders/__init__.py

  3. 更新的蜘蛛

byub.py文件

import scrapy
from craigslist_sample.items import CraigslistSampleItem

class MySpider(scrapy.Spider):
    name = "craig"
    allowed_domains = ["craigslist.org"]
    start_urls = [
        "http://sfbay.craigslist.org/search/sfc/npo"    ]

    def parse(self, response):
        items = []
        for sel in response.xpath('//p//a[@class="hdrlnk"]'):
           item = CraigslistSampleItem()
           item['title'] =  sel.xpath('text()').extract()
           item['link'] = sel.xpath('@href').extract()
           items.append(item)
        return items

日志：

2015-06-20 22:01:09 [scrapy] DEBUG: Scraped from <200 http://sfbay.craigslist.org/search/sfc/npo>
{'link': [u'/sfc/npo/5083113578.html'],
 'title': [u'Resident Services Coordinator']}
2015-06-20 22:01:09 [scrapy] DEBUG: Scraped from <200 http://sfbay.craigslist.org/search/sfc/npo>
{'link': [u'/sfc/npo/5083098605.html'],
 'title': [u'Resident Services Coordinator']}
2015-06-20 22:01:09 [scrapy] DEBUG: Scraped from <200 http://sfbay.craigslist.org/search/sfc/npo>
{'link': [u'/sfc/npo/5083051162.html'],
 'title': [u'General Manager - 939/951 Eddy']}
...

要运行爬网程序，我从scrapy.cfg所在的同一文件夹运行scrapy crawl --logfile logs craig。

运行具有不同日志级别的爬网程序scrapy crawl --logfile logs -L DEBUG craig

网友
2楼 · 编辑于 2024-04-28 15:20:55

蜘蛛return items中的最后一行缩进太远，需要：

for sel in response.xpath('//p'):
    item = CraigslistSampleItem()
    # ...

return items

也可以尝试执行scrapy crawl craig -o results.json将项输出到名为results.json的文件中。

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