[英]Running multiple spiders in scrapy - spider not found
正如標題所暗示的,我試圖在scrapy中使用多個蜘蛛。 一只蜘蛛, news_spider使用命令工作
scrapy crawl news_spider -o news.json
。 它產生了我期望的確切結果。
但是,當我嘗試使用以下命令使用蜘蛛網名時
scrapy crawl quotes_spider -o quotes.json
我收到以下消息,“未找到蜘蛛:quotes_spider ”
只是為了一些歷史,我首先創建了quotes_spider並且它正在工作。 然后我將它復制為news_spider並進行編輯,此時我將quotes_spider從蜘蛛目錄中移出。 現在我已經讓news_spider工作了,我將quotes_spider移回了蜘蛛目錄並得到了上面的錯誤消息。
目錄樹看起來像這樣
tutorial
├── news.json
├── scrapy.cfg
└── tutorial
├── __init__.py
├── __pycache__
│ ├── __init__.cpython-37.pyc
│ ├── items.cpython-37.pyc
│ └── settings.cpython-37.pyc
├── items.py
├── middlewares.py
├── pipelines.py
├── quotes.jl
├── quotes.json
├── settings.py
└── spiders
├── __init__.py
├── __pycache__
│ ├── __init__.cpython-37.pyc
│ ├── news_spider.cpython-37.pyc
│ └── quotes_spider.cpython-37.pyc
├── news_spider.py
└── quotes_spider.py
新聞蜘蛛:
from scrapy.exporters import JsonLinesItemExporter
from tutorial.items import TutorialItem
# Scrapy Spider
class FinNewsSpider(scrapy.Spider):
# Initializing log file
# logfile("news_spider.log", maxBytes=1e6, backupCount=3)
name = "news_spider"
allowed_domains = ['benzinga.com/']
start_urls = [
'https://www.benzinga.com/top-stories/20/09/17554548/stock-wars-ford-vs-general-motors-vs-tesla'
]
# MY SCRAPY STUFF
# response.xpath('//div[@class="article-content-body-only"]/p/text()').extract()
def parse(self, response):
paragraphs = response.xpath('//div[@class="article-content-body-only"]/p/text()').extract()
print(paragraphs)
for p in paragraphs:
yield TutorialItem(content=p)
行情蜘蛛:
from scrapy.exporters import JsonLinesItemExporter
class QuotesSpider(scrapy.Spider):
name = "quotes"
#### Actually don't have to use the start_requests function since it's built in. Can just use start_urls
# def start_requests(self):
# urls = [
# 'http://quotes.toscrape.com/page/1/',
# 'http://quotes.toscrape.com/page/2/'
# ]
# for url in urls:
# yield scrapy.Request(url=url, callback=self.parse)
start_urls = [
'http://quotes.toscrape.com/page/1/',
'http://quotes.toscrape.com/page/2/'
]
#### Original parse to just get the entire page
# def parse(self, response):
# page = response.url.split("/")[-2]
# filename = 'quotes-%s.html' % page
# with open(filename, 'wb') as f:
# f.write(response.body)
# self.log('Saved file %s' % filename)
#### Parse to actually gather targeted info
def parse(self, response):
for quote in response.css("div.quote"):
yield {
'text': quote.css("span.text::text").get(),
'author': quote.css("small.author::text").get(),
'tags': quote.css("div.tags a.tag::text").getall()
}
next_page = response.css("li.next a::attr(href)").get()
if next_page is not None:
next_page = response.urljoin(next_page)
yield scrapy.Request(next_page, callback=self.parse)
我已經搜索過 SO,我找到的關於多個蜘蛛的答案似乎都與同時運行多個蜘蛛有關,這不是我想要做的,所以我沒有找到為什么其中一個有效而另一個無效的答案。 任何人都可以在我的代碼中看到我可能忽略的錯誤嗎?
問題是你如何執行它。 你引用蜘蛛的名字是“quotes”而不是“quotes_spider”
class QuotesSpider(scrapy.Spider):
name = "quotes"
因此運行它的命令是:
scrapy crawl quotes -o quotes.json
就像你的新聞蜘蛛的名字是“news_spider”
class FinNewsSpider(scrapy.Spider):
# Initializing log file
# logfile("news_spider.log", maxBytes=1e6, backupCount=3)
name = "news_spider"
你執行它
scrapy crawl news_spider -o news.json
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