Python 处理 XML

1. xml.etree.ElementTree module

两种方法去读取并解析XML文件

1）

    import xml.etree.ElementTree as ET

    tree = ET.parse('sample.xml')

    root = tree.getroot()

2)

    f = open('sample.xml','r')

    xml = f.read()

    root = ET.fromstring(xml)

    folder_nodes = root.getiterator('FOLDER')

    folder_node = folder_nodes[0]

    folder_node.keys() # Show list of the Element keys

    folder_node.items() # Show tuple of the Element

    folder_node.attrib['NAME'] # Show value of attribute 'NAME'

    folder_node.set('NAME','TEST_SET') # Set or change value for the attribute 'NAME'

将修改的东西写回xml文件

    tree.write('sample.xml')

tree  是一个xml.etree.ElementTree.ElementTree instance。有如下方法：

class ElementTree
 |  Methods defined here:
 |  
 |  __init__(self, element=None, file=None)
 |  
 |  find(self, path)
 |  
 |  findall(self, path)
 |  
 |  findtext(self, path, default=None)
 |  
 |  getiterator(self, tag=None)
 |  
 |  getroot(self)
 |  
 |  parse(self, source, parser=None)
 |  
 |  write(self, file, encoding='us-ascii')

root, folder_node 都是一个Element， 有如下方法：

class _ElementInterface
 |  Methods defined here:
 |  
 |  __delitem__(self, index)
 |  
 |  __delslice__(self, start, stop)
 |  
 |  __getitem__(self, index)
 |  
 |  __getslice__(self, start, stop)
 |  
 |  __init__(self, tag, attrib)
 |  
 |  __len__(self)
 |  
 |  __repr__(self)
 |  
 |  __setitem__(self, index, element)
 |  
 |  __setslice__(self, start, stop, elements)
 |  
 |  append(self, element)
 |  
 |  clear(self)
 |  
 |  find(self, path)
 |  
 |  findall(self, path)
 |  
 |  findtext(self, path, default=None)
 |  
 |  get(self, key, default=None)
 |  
 |  getchildren(self)
 |  
 |  getiterator(self, tag=None)
 |  
 |  insert(self, index, element)
 |  
 |  items(self)
 |  
 |  keys(self)
 |  
 |  makeelement(self, tag, attrib)
 |  
 |  remove(self, element)
 |  
 |  set(self, key, value)

2. xml.dom.minidom module