web-scraping - 抓取错误 : 'NotSupported: Unsupported URL scheme ' ': no handler available for that scheme'

Question

我正在尝试删除网站，但在运行脚本时出现以下错误

'NotSupported: Unsupported URL scheme '': no handler available for that scheme'

如果规则没有错误，为什么会出现错误，您有什么建议，请帮助我。非常感谢。

代码在这里:

from scrapy.spiders import CrawlSpider, Rule, BaseSpider
from scrapy.linkextractors import LinkExtractor 
class FellowSearch(CrawlSpider):
    name ='fellow'
    allowed_domains = ['emma.cam.ac.uk']
    start_urls = [' https://www.emma.cam.ac.uk/']

    rules =(Rule(LinkExtractor(allow=(r'\?id=\d+$')),callback='parse_obj', follow=True),)

    def parse_obj(self, response):
        print response.url

Answer 1

您需要将 start_urls 中的 https 之前的空格更改为 start_urls =
['https://www.emma.cam.ac.uk/']。