python - scrapy 如何导入设置以覆盖它

Question

这是我的代码

class Test(Spider):
    self.settings.overrides['JOBDIR']= "seen"

我得到了:

  File "C:\Python27\lib\site-packages\scrapy\spider.py", line 46, in settings
    return self.crawler.settings
  File "C:\Python27\lib\site-packages\scrapy\spider.py", line 41, in crawler
    assert hasattr(self, '_crawler'), "Spider not bounded to any crawler"
AssertionError: Spider not bounded to any crawler

我正在扩展 Spider 而我没有使用 Crawler 因为我没有链接也没有可遵循的规则

我猜我的问题是因为我没有很好地导入设置，我需要你的帮助

Answer 1

为了更改蜘蛛中的设置，您可以:

class TestSpider(Spider):

    def set_crawler(self, crawler):
        super(TestSpider, self).set_crawler(crawler)
        crawler.settings.set('JOBDIR','seen')

    # rest of spider code