selector选择器技巧

[Danceiny]

scrapy Selectors

• When querying by class, consider using CSS

  >>> from scrapy import Selector
  >>> sel = Selector(text='<div class="hero shout"><time datetime="2014-07-23 19:00">Special date</time></div>')
  >>> sel.css('.shout').xpath('./time/@datetime').extract()
  [u'2014-07-23 19:00']