本文整理汇总了Python中scrapy.http.request.Request.meta['category']方法的典型用法代码示例。如果您正苦于以下问题：Python Request.meta['category']方法的具体用法？Python Request.meta['category']怎么用？Python Request.meta['category']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.http.request.Request的用法示例。
在下文中一共展示了Request.meta['category']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.http.request import Request [as 别名]
# 或者: from scrapy.http.request.Request import meta['category'] [as 别名]
def parse(self, response):
''' Parse response from start urls (/channels)
Channels are groups by category. So, this spider extracts the
category of each channel, and constructs a request with the meta
information of the category (that information would not be
available from the channel page otherwise)
'''
self.logger.debug("Parse url {}".format(response.url))
cat_container = response.xpath('/html/body/div[1]/div/article/div')
# Channels are grouped by category in containers with class '.channel-category'
for cat in cat_container.css('.channel-category'):
# extract the title of the category
cat_title = cat.xpath('h2/text()').extract_first()
# extract the link to the channel pages
for channel in cat.css('ul.channel-grid li'):
link = channel.xpath('a//@href').extract_first()
full_link = loaders.contextualize(link, base_url=response.url)
# Construct request
request = Request(full_link, callback=self.parse_channel)
request.meta['category'] = cat_title
yield request