本文整理汇总了Python中scrapy.Request.meta["article"]方法的典型用法代码示例。如果您正苦于以下问题：Python Request.meta["article"]方法的具体用法？Python Request.meta["article"]怎么用？Python Request.meta["article"]使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类scrapy.Request的用法示例。
在下文中一共展示了Request.meta["article"]方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: parse
# 需要导入模块: from scrapy import Request [as 别名]
# 或者: from scrapy.Request import meta["article"] [as 别名]
def parse(self, response):
"""Crawl article index pages.
From the index page, for each article extract it's topic first
because in this old version, there is no text information about the
topic in the article page. On index pages, it's contained in the alt
attribute of article/topic image, but alt is empty on the article page.
After that, follow the "Read more" link and get the other article
fields.
"""
for i, a in enumerate(response.xpath(
"//div[@class='articletrailer']/descendant::a[@class='trailer'][1]/@href")):
article = Article()
# If the image is not the default topic image, it will not have
# an appropriate selector, so we use it's div.
article["category"] = response.xpath(
"//div[@class='articleheading']/descendant::img/@alt").extract()[i]
article_url = response.urljoin(a.extract())
request = Request(article_url, callback=self.parse_article)
request.meta["article"] = article
yield request