<?xml version="1.0" encoding="utf-8"?>
<Schools>
  <School Name="XiDian">
    <Class Id="030612">
      <Student Name="salomon">
        <Scores>
          <Math>98</Math>
          <English>85</English>
          <physics>89</physics>
        </Scores>
      </Student>
      <Student Name="Jupiter">
        <Scores>
          <Math>74</Math>
          <English>83</English>
          <physics>69</physics>
        </Scores>
      </Student>
    </Class>
    <Class Id="030611">
      <Student Name="Venus">
        <Scores>
          <Math>98</Math>
          <English>85</English>
          <physics>89</physics>
        </Scores>
      </Student>
      <Student Name="Mars">
        <Scores>
          <Math>74</Math>
          <English>83</English>
          <physics>69</physics>
        </Scores>
      </Student>
    </Class>
  </School>
</Schools>

'''
Created on 2012-5-25
@author: salomon
'''
import xml.dom.minidom as minidom
dom = minidom.parse("E:\\test.xml")
root = dom.getElementsByTagName("Schools") #The function getElementsByTagName returns NodeList.
print(root.length)
for node in root: 
  print("Root element is %s。" %node.tagName)# 格式化输出，与C系列语言有很大区别。
  schools = node.getElementsByTagName("School")
  for school in schools:
    print(school.nodeName)
    print(school.tagName)
    print(school.getAttribute("Name"))
    print(school.attributes["Name"].value)
    classes = school.getElementsByTagName("Class")
    print("There are %d classes in school %s" %(classes.length, school.getAttribute("Name")))
    for mclass in classes:
      print(mclass.getAttribute("Id"))
      for student in mclass.getElementsByTagName("Student"):
        print(student.attributes["Name"].value)
        print(student.getElementsByTagName("English")[0].nodeValue) #这个为什么啊？
        print(student.getElementsByTagName("English")[0].childNodes[0].nodeValue)
        student.getElementsByTagName("English")[0].childNodes[0].nodeValue = 75
f = open('new.xml', 'w', encoding = 'utf-8')
dom.writexml(f,encoding = 'utf-8')
f.close()

'''
Created on 2012-5-25
@author: salomon
'''
from xml.etree.ElementTree import ElementTree
tree = ElementTree()
tree.parse("E:\\test.xml")
root = tree.getroot()
print(root.tag)
print(root[0].tag)
print(root[0].attrib)
schools = root.getchildren() 
for school in schools:
  print(school.get("Name"))
  classes = school.findall("Class")
  for mclass in classes:
    print(mclass.items())
    print(mclass.keys())
    print(mclass.attrib["Id"])
    math = mclass.find("Student").find("Scores").find("Math")
    print(math.text)
    math.set("teacher", "bada")
tree.write("new.xml")