Scrapy：“YourSpider”对象没有属性'crawler'

sshcrbum 于 2022-11-09 发布在其他

关注(0)|答案(2)|浏览(239)

我正在为一个项目构建一个简单的爬行器，我的代码中有这个错误。它仍然运行，但我想了解并解决它。我的爬行器看起来像这样：

class BookSpider(scrapy.Spider):

name = "books"

@classmethod
def from_crawler(cls, crawler):
    return cls(crawler.stats)

def __init__(self, stats):
    self.stats = stats
    self.visited_pages = []

错误消息如下所示：

2018-05-23 17:00:50 [scrapy.dupefilters] DEBUG: Filtered duplicate request: <GET https://www.goodreads.com/book/show/35036409-my-brilliant-friend> - no more duplicates will be shown (see DUPEFILTER_DEBUG to show all duplicates)
2018-05-23 17:00:50 [scrapy.core.scraper] ERROR: Spider error processing <GET https://www.goodreads.com/book/show/17465515-the-story-of-a-new-name> (referer: https://www.goodreads.com/book/show/35036409-my-brilliant-friend)
Traceback (most recent call last):
  File "/home/m17/elefano/miniconda3/lib/python3.6/site-packages/scrapy/utils/defer.py", line 102, in iter_errback
yield next(it)
GeneratorExit
Unhandled error in Deferred:
2018-05-23 17:00:50 [twisted] CRITICAL: Unhandled error in Deferred:

2018-05-23 17:00:50 [twisted] CRITICAL: 
Traceback (most recent call last):
  File "/home/m17/elefano/miniconda3/lib/python3.6/site-packages/twisted/internet/task.py", line 517, in _oneWorkUnit
result = next(self._iterator)
  File "/home/m17/elefano/miniconda3/lib/python3.6/site-packages/scrapy/utils/defer.py", line 63, in <genexpr>
work = (callable(elem, *args,**named) for elem in iterable)
  File "/home/m17/elefano/miniconda3/lib/python3.6/site-packages/scrapy/core/scraper.py", line 183, in _process_spidermw_output
self.crawler.engine.crawl(request=output, spider=spider)
  File "/home/m17/elefano/miniconda3/lib/python3.6/site-packages/scrapy/core/engine.py", line 210, in crawl
self.schedule(request, spider)
  File "/home/m17/elefano/miniconda3/lib/python3.6/site-packages/scrapy/core/engine.py", line 216, in schedule
if not self.slot.scheduler.enqueue_request(request):
  File "/home/m17/elefano/miniconda3/lib/python3.6/site-packages/scrapy/core/scheduler.py", line 55, in enqueue_request
self.df.log(request, self.spider)
  File "/home/m17/elefano/miniconda3/lib/python3.6/site-packages/scrapy/dupefilters.py", line 73, in log
spider.crawler.stats.inc_value('dupefilter/filtered', spider=spider)
AttributeError: 'BookSpider' object has no attribute 'crawler'

我有一个模糊的想法，这是一个问题的初始化，但我不能找出什么问题。

scrapy

来源：https://stackoverflow.com/questions/50492234/scrapy-yourspider-object-has-no-attribute-crawler

2条答案

按热度按时间

rbl8hiat1#

我认为您的spider没有正确地从crawler类继承。当我遇到这个错误时，我能够通过在from_crawler（）方法中添加super（）调用来解决它，该方法将crawler属性/方法引入您的自定义spider
下面是一个示例（请参阅from_crawler方法）：

from scrapy import signals
from scrapy import Spider

class DmozSpider(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/",
    ]

    @classmethod
    def from_crawler(cls, crawler, *args,**kwargs):
        spider = super(DmozSpider, cls).from_crawler(crawler, *args,**kwargs)
        crawler.signals.connect(spider.spider_closed, signal=signals.spider_closed)
        return spider

    def spider_closed(self, spider):
        spider.logger.info('Spider closed: %s', spider.name)

    def parse(self, response):
        pass

来源：https://doc.scrapy.org/en/latest/topics/signals.html

赞(0）回复(0）举报 2022-11-09

xn1cxnb42#

在init中添加crawler参数将解决此问题

def __init__(self, stats, crawler):
     self.stats = stats
     self.visited_pages = []
     self.crawler = crawler

赞(0）回复(0）举报 2022-11-09

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Scrapy：“YourSpider”对象没有属性'crawler'

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