#!/usr/bin/python
# coding:GBK
count = 0
import xml.dom.minidom

# 打开xml文档
dom = xml.dom.minidom.parse('writ.xml')
# 得到文档元素对象
root = dom.documentElement

itemlist = dom.getElementsByTagName('CUS_SW')
for item in itemlist:
    un = item.getAttribute("oValue")
    print un
    count = count + 1
print count