Problem Description
links = sel.xpath('//i[contains(@title,"置顶")]/following-sibling::a/@href').extract()报错：ValueError: All strings must be XML compatible: Unicode or ASCII, no NULL bytes or control characters
Solution
Method a: xpath entire sentence into Unicode
links = sel.xpath(u'//i[contains(@title,"置顶")]/following-sibling::a/@href').extract()Method Two: xpath statement has been converted to Unicode with the title variable
title = u"置顶"
links = sel.xpath('//i[contains(@title,"%s")]/following-sibling::a/@href' %(title)).extract()Method three: variable syntax (directly in xpath $Symbol Plus variable names) $title, parameter passing to title
links = sel.xpath('//i[contains(@title,$title)]/following-sibling::a/@href', title="置顶").extract()