本文整理匯總了Python中scrapy.http.request.Request.meta['category']方法的典型用法代碼示例。如果您正苦於以下問題：Python Request.meta['category']方法的具體用法？Python Request.meta['category']怎麽用？Python Request.meta['category']使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類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個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: parse
# 需要導入模塊: from scrapy.http.request import Request [as 別名]
# 或者: from scrapy.http.request.Request import meta['category'] [as 別名]
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