Python使用sax模块解析XML文件示例

本文实例讲述了Python使用sax模块解析XML文件。分享给大家供大家参考，具体如下：

XML样例：

<?xml version="1.0"?>
<collection shelf="New Arrivals">
  <movie title="Enemy Behind">
    <type>War, Thriller</type>
    <format>DVD</format>
    <year>2003</year>
    <rating>PG</rating>
    <stars>10</stars>
    <description>Talk about a US-Japan war</description>
  </movie>
  <movie title="Transformers">
    <type>Anime, Science Fiction</type>
    <format>DVD</format>
    <year>1989</year>
    <rating>R</rating>
    <stars>8</stars>
    <description>A schientific fiction</description>
  </movie>
    <movie title="Trigun">
    <type>Anime, Action</type>
    <format>DVD</format>
    <episodes>4</episodes>
    <rating>PG</rating>
    <stars>10</stars>
    <description>Vash the Stampede!</description>
  </movie>
  <movie title="Ishtar">
    <type>Comedy</type>
    <format>VHS</format>
    <rating>PG</rating>
    <stars>2</stars>
    <description>Viewable boredom</description>
  </movie>
</collection>

SAX解析代码展示：

from xml import sax
class MovieHandler(sax.ContentHandler):
  def __init__(self):
    # 初始化数据，并增加一个当前数据
    self.CurrentData = ""
    self.type = ""
    self.format = ""
    self.year = ""
    self.rating = ""
    self.stars = ""
    self.description = ""
  # 文档启动的时候调用
  def startDocument(self):
    print('XML开始解析中...')
  # 元素开始事件处理
  def startElement(self, name, attrs):
    self.CurrentData=name
    if self.CurrentData=='movie':
      print('*********movie*********')
      title=attrs['title']
      print('Title:{0}'.format(title))
  # 内容事件处理
  def characters(self, content):
    if self.CurrentData == "type":
      self.type = content
    elif self.CurrentData == "format":
      self.format = content
    elif self.CurrentData == "year":
      self.year = content
    elif self.CurrentData == "rating":
      self.rating = content
    elif self.CurrentData == "stars":
      self.stars = content
    elif self.CurrentData == "description":
      self.description = content
  # 元素结束事件处理
  def endElement(self, name):
    if self.CurrentData=='type':
      print('Type:{0}'.format(self.type))
    elif self.CurrentData=='format':
      print('Format:{0}'.format(self.format))
    elif self.CurrentData=='year':
      print('Year:{0}'.format(self.year))
    elif self.CurrentData == 'rating':
      print('Rating:{0}'.format(self.rating))
    elif self.CurrentData == 'stars':
      print('Stars:{0}'.format(self.stars))
    elif self.CurrentData == 'description':
      print('Description:{0}'.format(self.description))
    self.CurrentData = ""
  # 文档结束的时候调用
  def endDocument(self):
    print('XML文档解析结束!')
if __name__=='__main__':
  handler=MovieHandler()
  parser = sax.make_parser()
  # parser.setFeature(sax.handler.feature_namespaces, 0)
  parser.setContentHandler(handler)
  parser.parse("sax_test.xml")