Interfaz SAX.- Escapado de texto dentro de un documento XML

from xml.sax import saxutils
print '<entry>%s</entry>' % saxutils.escape('Valor 10 < 9')
import time, sys
from xml.sax.saxutils import XMLGenerator
from xml.sax.xmlreader import AttributesNSImpl

LOG_LEVELS = ['DEBUG', 'WARNING', 'ERROR']

class xml_logger:
    def __init__(self, output, encoding):
        logger = XMLGenerator(output, encoding)
        logger.startDocument()
        attrs = AttributesNSImpl({}, {})
        logger.startElementNS((None, u'log'), u'log', attrs)

        self._logger = logger
        self._output = output
        self._encoding = encoding

    def write_entry(self, level, msg):
        now = time.asctime(time.localtime())

        attr_vals = {
            (None, u'date'): now,
            (None, u'level'): LOG_LEVELS[level],
            }
        attr_qnames = {
            (None, u'date'): u'date',
            (None, u'level'): u'level',
            }

        attrs = AttributesNSImpl(attr_vals, attr_qnames)
        self._logger.startElementNS((None, u'entry'), u'entry', attrs)
        self._logger.characters(msg)
        self._logger.endElementNS((None, u'entry'), u'entry')

    def close(self):
        self._logger.endElementNS((None, u'log'), u'log')
        self._logger.endDocument()

if __name__ == "__main__":
    xl = xml_logger(sys.stdout, u'ISO-8859-1')
    xl.write_entry(2, u"Vanilla log entry")
    xl.close()
Interfaz DOM