Method __init__

Lib/xml/etree/ElementTree.py:1534–1577

(self, *, target=None, encoding=None)

    """

    def __init__(self, *, target=None, encoding=None):
        try:
            from xml.parsers import expat
        except ImportError:
            try:
                import pyexpat as expat
            except ImportError:
                raise ImportError(
                    "No module named expat; use SimpleXMLTreeBuilder instead"
                    )
        parser = expat.ParserCreate(encoding, "}")
        if target is None:
            target = TreeBuilder()
        # underscored names are provided for compatibility only
        self.parser = self._parser = parser
        self.target = self._target = target
        self._error = expat.error
        self._names = {} # name memo cache
        # main callbacks
        parser.DefaultHandlerExpand = self._default
        if hasattr(target, 'start'):
            parser.StartElementHandler = self._start
        if hasattr(target, 'end'):
            parser.EndElementHandler = self._end
        if hasattr(target, 'start_ns'):
            parser.StartNamespaceDeclHandler = self._start_ns
        if hasattr(target, 'end_ns'):
            parser.EndNamespaceDeclHandler = self._end_ns
        if hasattr(target, 'data'):
            parser.CharacterDataHandler = target.data
        # miscellaneous callbacks
        if hasattr(target, 'comment'):
            parser.CommentHandler = target.comment
        if hasattr(target, 'pi'):
            parser.ProcessingInstructionHandler = target.pi
        # Configure pyexpat: buffering, new-style attribute handling.
        parser.buffer_text = 1
        parser.ordered_attributes = 1
        self._doctype = None
        self.entity = {}
        try:
            self.version = "Expat %d.%d.%d" % expat.version_info
        except AttributeError:
            pass # unknown

    def _setevents(self, events_queue, events_to_report):
        # Internal API for XMLPullParser