[xpath与lxml介绍](xpath%E4%B8%8Elxml%E4%BB%8B%E7%BB%8D.md) [xpathhelper插件](xpathhelper%E6%8F%92%E4%BB%B6.md) [案例](xpathlxml%E6%A1%88%E4%BE%8B.md)