def __init__(self, handler):
self._handler = handler<EOL>self._head = "<STR_LIT>"<EOL>self._tail = "<STR_LIT>"<EOL>self._builder = None<EOL>self._level = <NUM_LIT:0><EOL>self._root = None<EOL>
Initialize the SAX handler.

        :Parameters:
            - `handler`: Object to handle stream start, end and stanzas.
        :Types:
            - `handler`: `XMLStreamHandler`