def __init__(self, tree=None, strict=False, namespaceHTMLElements=True, debug=False):
        """
        :arg tree: a treebuilder class controlling the type of tree that will be
            returned. Built in treebuilders can be accessed through
            html5lib.treebuilders.getTreeBuilder(treeType)

        :arg strict: raise an exception when a parse error is encountered

        :arg namespaceHTMLElements: whether or not to namespace HTML elements

        :arg debug: whether or not to enable debug mode which logs things

        Example:

        >>> from html5lib.html5parser import HTMLParser
        >>> parser = HTMLParser()                     # generates parser with etree builder
        >>> parser = HTMLParser('lxml', strict=True)  # generates parser with lxml builder which is strict

        """

        # Raise an exception on the first error encountered
        self.strict = strict

        if tree is None:
            tree = treebuilders.getTreeBuilder("etree")
        self.tree = tree(namespaceHTMLElements)
        self.errors = []

        self.phases = dict([(name, cls(self, self.tree)) for name, cls in
                            getPhases(debug).items()])

        :arg tree: a treebuilder class controlling the type of tree that will be
            returned. Built in treebuilders can be accessed through
            html5lib.treebuilders.getTreeBuilder(treeType)

        :arg strict: raise an exception when a parse error is encountered

        :arg namespaceHTMLElements: whether or not to namespace HTML elements

        :arg debug: whether or not to enable debug mode which logs things

        Example:

        >>> from html5lib.html5parser import HTMLParser
        >>> parser = HTMLParser()                     # generates parser with etree builder
        >>> parser = HTMLParser('lxml', strict=True)  # generates parser with lxml builder which is strict

        
product/gradle-plugin/src/main/python/pip/_vendor/html5lib/html5parser.py