Python获取任意xml节点值的方法

本文实例讲述了Python获取任意xml节点值的方法。分享给大家供大家参考。具体实现方法如下：

    # -*- coding: utf-8 -*-
    import xml.dom.minidom
    ELEMENT_NODE = xml.dom.Node.ELEMENT_NODE
    class SimpleXmlGetter(object):
      def __init__(self, data):
        if type(data) == str:
          self.root = xml.dom.minidom.parse(data)
        else:
          self.root = data
      def __getattr__(self, name):    #support . operation
        if name == 'data':
          return self.root.firstChild.data
        for c in self.root.childNodes:
          if c.nodeType == ELEMENT_NODE and c.tagName == name:
            return SimpleXmlGetter(c)
      def __getitem__(self, index):    #support [] operation
        eNodes = [ e for e in self.root.parentNode.childNodes
              if e.nodeType == ELEMENT_NODE and e.tagName == self.root.tagName]
        return SimpleXmlGetter(eNodes[index])
      def __call__(self, *args, **kwargs): #support () openration, for query conditions
        for e in self.root.parentNode.childNodes:
          if e.nodeType == ELEMENT_NODE:
            for key in kwargs.keys():
               if e.getAttribute(key) != kwargs[key]:
                break
            else:
              return SimpleXmlGetter(e)
    if __name__ == "__main__":
      x = SimpleXmlGetter("sysd.xml")
      print x.sysd.sysagent.param[2].data
      print x.sysd.sysagent.param(name="querytimeout", type="second").data

希望本文所述对大家的Python程序设计有所帮助。