1、問題描述:
實現定位<h2>品牌</h2>節點
brand_tag = sel.xpath("//h2[text()= '品牌']")
報錯:ValueError: All strings must be XML compatible: Unicode or ASCII, no NULL bytes or control characters
2、解決方法:
(1)brand = u'品牌'
brand_tag = sel.xpath("//h2[text()= '%s']"%(brand))
(2)brand_tag = sel.xpath(u"//h2[text()= '品牌']")