python中的xml.dom模塊使用的就是傳統(tǒng)的dom解析api和方法。所以也就不寫什么了，主要就是練習(xí)敲敲代碼，繼續(xù)熟悉python。本文通過xml.dom.minidom創(chuàng)建一個xml文檔，然后再解析出來，用以熟悉相關(guān)接口方法的使用。

創(chuàng)建一個xml文檔：

'''

Createdon2012-1-10

Createaxmldocument

@author:xiaojay

'''

fromxml.domimportminidom

doc=minidom.Document()

doc.appendChild(doc.createComment("Thisisasimplexml."))

booklist=doc.createElement("booklist")

doc.appendChild(booklist)

defaddBook(newbook):

book=doc.createElement("book")

book.setAttribute("id",newbook["id"])

title=doc.createElement("title")

title.appendChild(doc.createTextNode(newbook["title"]))

book.appendChild(title)

author=doc.createElement("author")

name=doc.createElement("name")

firstname=doc.createElement("firstname")

firstname.appendChild(doc.createTextNode(newbook["firstname"]))

lastname=doc.createElement("lastname")

lastname.appendChild(doc.createTextNode(newbook["lastname"]))

name.appendChild(firstname)

name.appendChild(lastname)

author.appendChild(name)

book.appendChild(author)

pubdate=doc.createElement("pubdate")

pubdate.appendChild(doc.createTextNode(newbook["pubdate"]))

book.appendChild(pubdate)

booklist.appendChild(book)

addBook({"id":"1001","title":"Anapple","firstname":"Peter","lastname":"Zhang","pubdate":"2012-1-12"})

addBook({"id":"1002","title":"Love","firstname":"Mike","lastname":"Li","pubdate":"2012-1-10"})

addBook({"id":"1003","title":"Steve.Jobs","firstname":"Tom","lastname":"Wang","pubdate":"2012-1-19"})

addBook({"id":"1004","title":"HarryPotter","firstname":"Peter","lastname":"Chen","pubdate":"2012-11-11"})

f=file("book.xml","w")

doc.writexml(f)

f.close()

通過doc.toprettyxml(indent,newl,encoding)方法可以優(yōu)雅顯示xml文檔，但是要避免直接寫入文本，否則會給解析帶來麻煩，盡量使用自帶的writexml方法。

生成的文檔內(nèi)容：

Peter

Zhang

2012-1-12

.................

解析該xml文檔：

'''

Createdon2012-1-10

Scanaxmldoc

@author:xiaojay

'''

fromxml.domimportminidom,Node

classbookscanner:

def__init__(self,doc):

forchildindoc.childNodes:

ifchild.nodeType==Node.ELEMENT_NODE\

andchild.tagName=="book":

bookid=child.getAttribute("id")

print"*"*20

print"Bookid:",bookid

self.handle_book(child)

defhandle_book(self,node):

forchildinnode.childNodes:

ifchild.nodeType==Node.ELEMENT_NODE:

ifchild.tagName=="title":

print"Title:",self.getText(child.firstChild)

ifchild.tagName=="author":

self.handle_author(child)

ifchild.tagName=="pubdate":

print"Pubdate:",self.getText(child.firstChild)

defgetText(self,node):

ifnode.nodeType==Node.TEXT_NODE:

returnnode.nodeValue

else:return""

defhandle_author(self,node):

author=node.firstChild

forchildinauthor.childNodes:

ifchild.nodeType==Node.ELEMENT_NODE:

ifchild.tagName=="firstname":

print"Firstname:",self.getText(child.firstChild)

ifchild.tagName=="lastname":

print"Lastname:",self.getText(child.firstChild)

doc=minidom.parse("book.xml")

forchildindoc.childNodes:

ifchild.nodeType==Node.COMMENT_NODE:

print"Conment:",child.nodeValue

ifchild.nodeType==Node.ELEMENT_NODE:

bookscanner(child)

以上內(nèi)容為大家介紹了使用python自帶的xml.dom創(chuàng)建和解析xml，希望對大家有所幫助，如果想要了解更多Python相關(guān)知識，請關(guān)注IT培訓(xùn)機構(gòu):千鋒教育。

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