Python xml.etree.cElementTree 模块，register_namespace() 实例源码

def register_prefix(self, nspair):
        """
        Register with ElementTree a set of namespaces

        :param nspair: A dictionary of prefixes and uris to use when
            constructing the text representation.
        :return:
        """
        for prefix, uri in nspair.items():
            try:
                ElementTree.register_namespace(prefix, uri)
            except AttributeError:
                # Backwards compatibility with ET < 1.3
                ElementTree._namespace_map[uri] = prefix
            except ValueError:
                pass

def _build_command_line_elem(command_line):
    command_line_parts = shlex.split(command_line, posix=False)
    prefix = "rsp"
    ET.register_namespace(prefix, c.XML_NS_MSRSP)
    command_line_elem = ET.Element('{%s}CommandLine' % c.XML_NS_MSRSP)
    command_elem = ET.Element('{%s}Command' % c.XML_NS_MSRSP)
    command_elem.text = command_line_parts[0]
    command_line_elem.append(command_elem)
    for arguments_text in command_line_parts[1:]:
        arguments_elem = ET.Element('{%s}Arguments' % c.XML_NS_MSRSP)
        arguments_elem.text = arguments_text
        command_line_elem.append(arguments_elem)
    tree = ET.ElementTree(command_line_elem)
    str_io = StringIO()
    tree.write(str_io)
    return str_io.getvalue()

def register_namespaces(namespaces=namespaces):
    for name, url in namespaces.items():
        if name != 'svg': # creates invalid xml
            et.register_namespace(name, url)

def write(self, filename):
        # Output does not look nice. Use `xmllint --format <input> > <output>'
        # to get a nice format (part of libxml2)

        etree.register_namespace('', self.namespace)
        self.doc.write(filename, encoding="UTF-8")

def registerNamespaces():
    for longName, shortName in xmlns.items():
        ET.register_namespace(shortName, longName)

def register_namespace(prefix, uri):
        from xml.etree import ElementTree
        # cElementTree uses ElementTree's _namespace_map, so that's ok
        ElementTree._namespace_map[uri] = prefix

def register_namespace(prefix, uri):
    from xml.etree.ElementTree import _namespace_map
    if re.match("ns\d+$", prefix):
        raise ValueError("Prefix format reserved for internal use")
    for k, v in _namespace_map.items():
        if k == uri or v == prefix:
            del _namespace_map[k]
    _namespace_map[uri] = prefix

def register_namespaces(namespaces=namespaces):
    for name, url in namespaces.items():
        if name != 'svg': # creates invalid xml
            et.register_namespace(name, url)

def register_namespace(prefix, uri):
    from xml.etree.ElementTree import _namespace_map
    if re.match("ns\d+$", prefix):
        raise ValueError("Prefix format reserved for internal use")
    for k, v in _namespace_map.items():
        if k == uri or v == prefix:
            del _namespace_map[k]
    _namespace_map[uri] = prefix