Robot Framework 代码20之etreedomwrapper.py

from StringIO import StringIO
try:
    import xml.etree.cElementTree as ET
except ImportError:
    try:
        import cElementTree as ET
    except ImportError:
        try:
            import xml.etree.ElementTree as ET
        except ImportError:
            import elementtree.ElementTree as ET

from abstractdomwrapper import AbstractDomWrapper


class DomWrapper(AbstractDomWrapper):
    
    """A wrapper for Python's XML DOM for simplifying reading data from it.
   
    See documentation of AbstractDomWrapper for further usage information.
    """

    def __init__(self, path=None, string=None, node=None):
        """Initialize by giving 'path' to an xml file or xml as a 'string'.
       
        Alternative initialization by giving dom 'node' ment to be used only
        internally. 'path' may actually also be an already opened file object
        (or anything accepted by ElementTree.parse).
        """
        AbstractDomWrapper.__init__(self, path)
        # This should NOT be changed to 'if node:'. See chapter Truth Testing
        # from
        if node is None:
            node = ET.parse(path or StringIO(string)).getroot()
        self.name = node.tag
        self.attrs = dict(node.items())
        self.text = node.text or ''
        for child in list(node):
            self.children.append(DomWrapper(path, node=child))
 
文件路径：C:\Python26\lib\site-packages\robot\etreedomwrapper.py
功能：定义了DomWrapper的基类，XML DOM 定义了访问和处理 XML 文档的标准方法。这里仅仅是etree的读，暂不深入 。暂不深入