How to use the html5lib.constants.namespaces function in html5lib

def __init__(self, name, namespace=None):
            self._name = name
            self._namespace = namespace
            self._element = ElementTree.Element(self._getETreeTag(name,
                                                                  namespace))
            if namespace is None:
                self.nameTuple = namespaces["html"], self._name
            else:
                self.nameTuple = self._namespace, self._name
            self.parent = None
            self._childNodes = []
            self._flags = []

def _filter_kwargs():
    kwargs = {
        'allowed_elements': sanitizer.allowed_elements | frozenset(
            ((namespaces['html'], 'cms-plugin'), ),
        ),
    }

    if settings.TEXT_HTML_SANITIZE:
        kwargs.update({
            'allowed_elements': kwargs['allowed_elements'] | frozenset(
                (namespaces['html'], tag)
                for tag in settings.TEXT_ADDITIONAL_TAGS
            ),
            'allowed_attributes': sanitizer.allowed_attributes | frozenset(
                (None, attr)
                for attr in settings.TEXT_ADDITIONAL_ATTRIBUTES
            ),
            'allowed_protocols': sanitizer.allowed_protocols | frozenset(
                settings.TEXT_ADDITIONAL_PROTOCOLS
            ),
        })
    return kwargs

def __init__(self, name, namespace=None):
            self._name = name
            self._namespace = namespace
            self._element = ElementTree.Element(self._getETreeTag(name,
                                                                  namespace))
            if namespace is None:
                self.nameTuple = namespaces["html"], self._name
            else:
                self.nameTuple = self._namespace, self._name
            self.parent = None
            self._childNodes = []
            self._flags = []

def getNameTuple(self):
        if self.namespace == None:
            return namespaces["html"], self.name
        else:
            return self.namespace, self.name

def getNameTuple(self):
        if self.namespace == None:
            return namespaces["html"], self.name
        else:
            return self.namespace, self.name

def getNameTuple(self):
            if self.namespace is None:
                return namespaces["html"], self.name
            else:
                return self.namespace, self.name

def getNameTuple(self):
        if self.namespace == None:
            return namespaces["html"], self.name
        else:
            return self.namespace, self.name

def getNameTuple(self):
        if self.namespace == None:
            return namespaces["html"], self.name
        else:
            return self.namespace, self.name

def getNameTuple(self):
        if self.namespace == None:
            return namespaces["html"], self.name
        else:
            return self.namespace, self.name

def __init__(self, name, namespace=None):
            self._name = name
            self._namespace = namespace
            self._element = ElementTree.Element(self._getETreeTag(name,
                                                                  namespace))
            if namespace is None:
                self.nameTuple = namespaces["html"], self._name
            else:
                self.nameTuple = self._namespace, self._name
            self.parent = None
            self._childNodes = []
            self._flags = []