def __init__(self, sourceFilename):
        """
        @param sourceFilename: the filename to load the XML out of.
        """
        self.sourceFilename = sourceFilename
        self.prefixMap = _NSContext()
        self.inCDATA = False

        @param sourceFilename: the filename to load the XML out of.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/template.py