我正在尝试学习 scrapy 和 python。我使用的网址是 https://www.riddles.com/jokes-and-riddles在 conda 控制台中，response.css 工作正常并提取“Riddle”单词。但是，当尝试在 Visual Studio 中运行 spy 程序时，它会加载所有内容并运行，但不会导出任何数据。
蜘蛛
import scrapy
from ..items import BookItem
class BookSpiderSpider(scrapy.Spider):
name = "book_spider"
start_urls = (
'https://www.riddles.com/jokes-and-riddles',
)
def parse(self, response) :
items = BookItem()
title_name = response.css('span.hidden-print::text').extract()
items['title_name'] = title_name
yield items
项目
import scrapy
class BookItem(scrapy.Item):
title_name = scrapy.Field()
pass
控制台
(scraper) C:\Users\Naked\tutorial\book\book>scrapy crawl book_spider
2019-05-02 14:07:04 [scrapy] INFO: Scrapy 1.1.1 started (bot: book)
2019-05-02 14:07:04 [scrapy] INFO: Overridden settings: {'NEWSPIDER_MODULE': 'book.spiders',
'ROBOTSTXT_OBEY': True, 'SPIDER_MODULES': ['book.spiders'], 'BOT_NAME': 'book'}
2019-05-02 14:07:05 [scrapy] INFO: Enabled extensions:
['scrapy.extensions.telnet.TelnetConsole',
'scrapy.extensions.logstats.LogStats',
'scrapy.extensions.corestats.CoreStats']
2019-05-02 14:07:05 [scrapy] INFO: Enabled downloader middlewares:
['scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware',
'scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',
'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',
'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',
'scrapy.downloadermiddlewares.retry.RetryMiddleware',
'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',
'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',
'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',
'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',
'scrapy.downloadermiddlewares.cookies.CookiesMiddleware',
'scrapy.downloadermiddlewares.chunked.ChunkedTransferMiddleware',
'scrapy.downloadermiddlewares.stats.DownloaderStats']
2019-05-02 14:07:05 [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']
2019-05-02 14:07:05 [scrapy] INFO: Enabled item pipelines:
[]
2019-05-02 14:07:05 [scrapy] INFO: Spider opened
2019-05-02 14:07:05 [scrapy] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2019-05-02 14:07:05 [scrapy] DEBUG: Telnet console listening on 127.0.0.1:6024
2019-05-02 14:07:06 [scrapy] DEBUG: Crawled (200) <GET https://www.riddles.com/robots.txt> (referer: None)
2019-05-02 14:07:07 [scrapy] DEBUG: Crawled (200) <GET https://www.riddles.com/jokes-and-riddles> (referer: None)
2019-05-02 14:07:07 [scrapy] ERROR: Spider error processing <GET https://www.riddles.com/jokes-and-riddles> (referer: None)
Traceback (most recent call last):
File "C:\Users\Naked\Anaconda3\envs\scraper\lib\site-packages\twisted\internet\defer.py",
line 651, in _runCallbacks
current.result = callback(current.result, *args, **kw)
File "C:\Users\Naked\Anaconda3\envs\scraper\lib\site-packages\scrapy\spiders\__init__.py", line 76, in parse
raise NotImplementedError
NotImplementedError
2019-05-02 14:07:07 [scrapy] INFO: Closing spider (finished)
2019-05-02 14:07:07 [scrapy] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 453,
'downloader/request_count': 2,
'downloader/request_method_count/GET': 2,
'downloader/response_bytes': 32139,
'downloader/response_count': 2,
'downloader/response_status_count/200': 2,
'finish_reason': 'finished',
'finish_time': datetime.datetime(2019, 5, 2, 11, 7, 7, 302220),
'log_count/DEBUG': 3,
'log_count/ERROR': 1,
'log_count/INFO': 7,
'response_received_count': 2,
'scheduler/dequeued': 1,
'scheduler/dequeued/memory': 1,
'scheduler/enqueued': 1,
'scheduler/enqueued/memory': 1,
'spider_exceptions/NotImplementedError': 1,
'start_time': datetime.datetime(2019, 5, 2, 11, 7, 5, 824498)}
2019-05-02 14:07:07 [scrapy] INFO: Spider closed (finished)
抱歉，代码太多，只是想解释一切。
最佳答案
您确定粘贴在这里的蜘蛛代码缩进良好吗？因为如果不是，那就是你的错误所在。
Python 使用缩进来分隔类或函数的范围，在您的代码中，parse 方法超出了类蜘蛛的范围。
如果您熟悉其他语言，则相当于执行以下操作:
class Example {
}
function parse {
}
而不是
class Example {
function parse {
}
}
如果您看到 ERROR 日志，您可以了解发生了什么:
File "C:\Users\Naked\Anaconda3\envs\scraper\lib\site-packages\scrapy\spiders_init_.py", line 76, in parse
raise NotImplementedError
这不是最好的错误消息，因为它指向项目外部的文件，但会给您一个提示。
所以解决方案是像这样缩进代码:
class BookSpiderSpider(scrapy.Spider):
name = "book_spider"
start_urls = (
'https://www.riddles.com/jokes-and-riddles',
)
def parse(self, response) :
items = BookItem()
title_name = response.css('span.hidden-print::text').extract()
items['title_name'] = title_name
yield items
关于python - 控制台不导出任何抓取的数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55951291/