Python 3.x 刮擦爬行误差

我不熟悉python和scrapy。我按照一个教程做了一个scrapy crawl quotes.toscrape.com

我输入的代码与教程中的代码一模一样，但当我运行scrapy crawl quotes时，我不断得到一个

ValueError:invalid hostname

：错误。我在

Pycharm

电脑上做这件事

我尝试在

start\u URL=[]

部分中对

URL

使用单引号和双引号，但这并没有修复错误

这是代码的样子：

import scrapy

class QuoteSpider(scrapy.Spider):
    name = 'quotes'
    start_urls = [
        'http: // quotes.toscrape.com /'
    ]

    def parse(self, response):
        title = response.css('title').extract()
        yield {'titletext':title}

2019-11-08 12:52:42 [scrapy.core.engine] INFO: Spider opened
2019-11-08 12:52:42 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2019-11-08 12:52:42 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
2019-11-08 12:52:42 [scrapy.downloadermiddlewares.robotstxt] ERROR: Error downloading <GET http:///robots.txt>: invalid hostname: 
Traceback (most recent call last):
  File "/Users/newuser/PycharmProjects/ScrapyTutorial/venv/lib/python2.7/site-packages/scrapy/core/downloader/middleware.py", line 44, in process_request
    defer.returnValue((yield download_func(request=request, spider=spider)))
ValueError: invalid hostname: 
2019-11-08 12:52:42 [scrapy.core.scraper] ERROR: Error downloading <GET http:///%20//%20quotes.toscrape.com%20/>
Traceback (most recent call last):
  File "/Users/newuser/PycharmProjects/ScrapyTutorial/venv/lib/python2.7/site-packages/scrapy/core/downloader/middleware.py", line 44, in process_request
    defer.returnValue((yield download_func(request=request, spider=spider)))
ValueError: invalid hostname: 
2019-11-08 12:52:42 [scrapy.core.engine] INFO: Closing spider (finished)

它应该是为了标题而删除网站

这就是错误的样子：

import scrapy

class QuoteSpider(scrapy.Spider):
    name = 'quotes'
    start_urls = [
        'http: // quotes.toscrape.com /'
    ]

    def parse(self, response):
        title = response.css('title').extract()
        yield {'titletext':title}

2019-11-08 12:52:42 [scrapy.core.engine] INFO: Spider opened
2019-11-08 12:52:42 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2019-11-08 12:52:42 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
2019-11-08 12:52:42 [scrapy.downloadermiddlewares.robotstxt] ERROR: Error downloading <GET http:///robots.txt>: invalid hostname: 
Traceback (most recent call last):
  File "/Users/newuser/PycharmProjects/ScrapyTutorial/venv/lib/python2.7/site-packages/scrapy/core/downloader/middleware.py", line 44, in process_request
    defer.returnValue((yield download_func(request=request, spider=spider)))
ValueError: invalid hostname: 
2019-11-08 12:52:42 [scrapy.core.scraper] ERROR: Error downloading <GET http:///%20//%20quotes.toscrape.com%20/>
Traceback (most recent call last):
  File "/Users/newuser/PycharmProjects/ScrapyTutorial/venv/lib/python2.7/site-packages/scrapy/core/downloader/middleware.py", line 44, in process_request
    defer.returnValue((yield download_func(request=request, spider=spider)))
ValueError: invalid hostname: 
2019-11-08 12:52:42 [scrapy.core.engine] INFO: Closing spider (finished)

2019-11-08 12:52:42[刮屑核心引擎]信息：蜘蛛网已打开
2019-11-08 12:52:42[scrapy.extensions.logstats]信息：爬网0页（0页/分钟），爬网0项（0项/分钟）
2019-11-08 12:52:42[scrapy.extensions.telnet]信息：telnet控制台监听127.0.0.1:6023
2019-11-08 12:52:42[scrapy.downloadermiddleware.robotstxt]错误：下载错误：无效主机名：
回溯（最近一次呼叫最后一次）：
文件“/Users/newuser/PycharmProjects/ScrapyTutorial/venv/lib/python2.7/site packages/scrapy/core/downloader/middleware.py”，第44行，处理中请求
defer.returnValue（（yield download_func（request=request，spider=spider）））
ValueError:无效的主机名：
2019-11-08 12:52:42[scrapy.core.scraper]错误：下载错误
回溯（最近一次呼叫最后一次）：
文件“/Users/newuser/PycharmProjects/ScrapyTutorial/venv/lib/python2.7/site packages/scrapy/core/downloader/middleware.py”，第44行，处理中请求
defer.returnValue（（yield download_func（request=request，spider=spider）））
ValueError:无效的主机名：
2019-11-08 12:52:42[刮屑芯发动机]信息：关闭卡盘（已完成）

不要对URL使用空格

start_urls = [
    'http://quotes.toscrape.com/'
]

---

你能分享一下你是如何使用上面提到的类的吗？嗨，原来url中的空格是根据下面的评论抛出代码的。我完全确定幕后是如何与全班合作的。