Python获取任意xml节点值的方法

# -*- coding: utf-8 -*-import xml.dom.minidomELEMENT_NODE = xml.dom.Node.ELEMENT_NODEclass 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