Python如何用dom模块生成XML文件

Python如何用dom模块生成XML文件呢?
主要方法三点:
首先、生成XML节点(node)

createElement("node_name")
然后、给节点添加属性值(Attribute)
node.setAttribute("att_name", "arr_value")
最后、节点的标签值(data)
createTextNode("node_value")
其中第1、3点在创建完节点(节点值)之后，还需使用下面的方法添加到指点的节点的位置下面：
prev_node.appendChild(cur_node)
这里的prev_node要添加节点的上一层节点，而cur_node即为当前要添加的节点了。
代码如下：
Created on 2012-8-28
@author: walfred
@module: domxml.genXML
@description:
'''
import xml.dom.minidom as Dom

if __name__ == "__main__":
doc = Dom.Document()
root_node = doc.createElement("book_store")
root_node.setAttribute("name", "newhua")
root_node.setAttribute("website", "CODEGO.net")
doc.appendChild(root_node)

book_node = doc.createElement("book1")

book_name_node = doc.createElement("name")
book_name_value = doc.createTextNode("hamlet")
book_name_node.appendChild(book_name_value)
book_node.appendChild(book_name_node)

book_author_node = doc.createElement("author")
book_author_value = doc.createTextNode("William Shakespeare")
book_author_node.appendChild(book_author_value)
book_node.appendChild(book_author_node)

root_node.appendChild(book_node)

f = open("book_store.xml", "w")
f.write(doc.toprettyxml(indent = "\t", newl = "\n", encoding = "utf-8"))
f.close()

这个代码将在当前目录下生成一个book_store.xml文件：
<?xml version="1.0" encoding="utf-8"?>
<book_store name="newhua" website="CODEGO.net">
<book1>
<name>hamlet</name>
<author>William Shakespeare</author>
</book1>
</book_store>

代码如下：
Created on 2012-8-28

@author: walfred
@module: domxml.wXMLbyDom
@description:

import xml.dom.minidom as Dom

class XMLGenerator:
def __init__(self, xml_name):
self.doc = Dom.Document()
self.xml_name = xml_name

def createNode(self, node_name):
return self.doc.createElement(node_name)

def addNode(self, node, prev_node = None):
cur_node = node
if prev_node is not None:
prev_node.appendChild(cur_node)
else:
self.doc.appendChild(cur_node)
return cur_node

def setNodeAttr(self, node, att_name, value):
cur_node = node
cur_node.setAttribute(att_name, value)

def setNodeValue(self, cur_node, value):
node_data = self.doc.createTextNode(value)
cur_node.appendChild(node_data)

def genXml(self):
f = open(self.xml_name, "w")
f.write(self.doc.toprettyxml(indent = "\t", newl = "\n", encoding = "utf-8"))
f.close()

if __name__ == "__main__":
myXMLGenerator = XMLGenerator("book_store.xml")

#xml root node
node_book_store = myXMLGenerator.createNode("book_store")
myXMLGenerator.setNodeAttr(node_book_store, "name", "new hua")
myXMLGenerator.setNodeAttr(node_book_store, "website", "CODEGO.net")
myXMLGenerator.addNode(node = node_book_store)

#book01
node_book_01 = myXMLGenerator.createNode("book")

node_book_01_name = myXMLGenerator.createNode("name")
myXMLGenerator.setNodeValue(node_book_01_name, "Hamlet")
myXMLGenerator.addNode(node_book_01_name, node_book_01)

node_book_01_author = myXMLGenerator.createNode("author")
myXMLGenerator.setNodeValue(node_book_01_author, "William Shakespeare")
myXMLGenerator.addNode(node_book_01_author, node_book_01)

node_book_01_price = myXMLGenerator.createNode("price")
myXMLGenerator.setNodeValue(node_book_01_price, "$20")
myXMLGenerator.addNode(node_book_01_price, node_book_01)

node_book_01_grade = myXMLGenerator.createNode("grade")
myXMLGenerator.setNodeValue(node_book_01_grade, "good")
myXMLGenerator.addNode(node_book_01_grade, node_book_01)

myXMLGenerator.addNode(node_book_01, node_book_store)

#book 02
node_book_02 = myXMLGenerator.createNode("book")

node_book_02_name = myXMLGenerator.createNode("name")
myXMLGenerator.setNodeValue(node_book_02_name, "shuihu")
myXMLGenerator.addNode(node_book_02_name, node_book_02)

node_book_02_author = myXMLGenerator.createNode("author")
myXMLGenerator.setNodeValue(node_book_02_author, "naian shi")
myXMLGenerator.addNode(node_book_02_author, node_book_02)

node_book_02_price = myXMLGenerator.createNode("price")
myXMLGenerator.setNodeValue(node_book_02_price, "$200")
myXMLGenerator.addNode(node_book_02_price, node_book_02)

node_book_02_grade = myXMLGenerator.createNode("grade")
myXMLGenerator.setNodeValue(node_book_02_grade, "good")
myXMLGenerator.addNode(node_book_02_grade, node_book_02)

myXMLGenerator.addNode(node_book_02, node_book_store)

#gen
myXMLGenerator.genXml()
同样这个方法会在本目录下生成一个book_store.xml文件，代码如下：
<?xml version="1.0" encoding="utf-8"?>
<book_store name="new hua" website="CODEGO.net">
<book>
<name>Hamlet</name>
<author>William Shakespeare</author>
<price>$20</price>
<grade>good</grade>
</book>
<book>
<name>shuihu</name>
<author>naian shi</author>
<price>$200</price>
<grade>good</grade>
</book>
</book_store>