XML do JSON w Python

import  xml.dom.minidom
from xml.dom import getChildNodesByName
import json

def dumpAddressing():
    xdom = xml.dom.minidom.parse("GenericAddressing.xml")
    xdoc = xdom.documentElement
    dict = {}
    xml_funcs = getChildNodesByName(xdoc, u"Function")
    for func in xml_funcs:
        shortname = func.getAttribute(u"Name")
        address = func.getAttribute(u"Address")
        for name in  getChildNodesByName(func, u"Name"):
            longname = name.firstChild.nodeValue
            dict[hex(int(address))[2:].upper()] = (shortname, longname)
            break

    js = json.dumps(dict)
    f = open("json/addressing.json", "w")
    f.write(js)
    f.close()
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