[蟒蛇菜谱]Python获取任意xml节点的值

# -*- 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