文档对象模型(“ DOM”)是来自万维网联合会(W3C)的一种跨语言API,用于访问和修改XML文档。
DOM对于随机访问应用程序非常有用。SAX一次只允许您查看一份文档。如果您正在查看一个SAX元素,则无权访问另一个元素。
这是使用xml.dom模块快速加载XML文档和创建minidom对象的最简单方法。minidom对象提供了一种简单的解析器方法,该方法可从XML文件快速创建DOM树。
示例短语调用minidom对象的parse(file [,parser])函数,以将file指定的XML文件解析为DOM树对象。
#!/usr/bin/python from xml.dom.minidom import parse import xml.dom.minidom # Open XML document using minidom parser DOMTree = xml.dom.minidom.parse("movies.xml") collection = DOMTree.documentElement if collection.hasAttribute("shelf"): print "Root element : %s" % collection.getAttribute("shelf") # Get all the movies in the collection movies = collection.getElementsByTagName("movie") # Print detail of each movie. for movie in movies: print "*****Movie*****" if movie.hasAttribute("title"): print "Title: %s" % movie.getAttribute("title") type = movie.getElementsByTagName('type')[0] print "Type: %s" % type.childNodes[0].data format = movie.getElementsByTagName('format')[0] print "Format: %s" % format.childNodes[0].data rating = movie.getElementsByTagName('rating')[0] print "Rating: %s" % rating.childNodes[0].data description = movie.getElementsByTagName('description')[0] print "Description: %s" % description.childNodes[0].data
这将产生以下结果-
Root element : New Arrivals *****Movie***** Title: Enemy Behind Type: War, Thriller Format: DVD Rating: PG Description: Talk about a US-Japan war *****Movie***** Title: Transformers Type: Anime, Science Fiction Format: DVD Rating: R Description: A schientific fiction *****Movie***** Title: Trigun Type: Anime, Action Format: DVD Rating: PG Description: Vash the Stampede! *****Movie***** Title: Ishtar Type: Comedy Format: VHS Rating: PG Description: Viewable boredom
有关DOM API文档的完整详细信息,请参阅标准Python API。