How to use the bs4.element.Doctype function in bs4

def assertDoctypeHandled(self, doctype_fragment):
        """Assert that a given doctype string is handled correctly."""
        doctype_str, soup = self._document_with_doctype(doctype_fragment)

        # Make sure a Doctype object was created.
        doctype = soup.contents[0]
        self.assertEqual(doctype.__class__, Doctype)
        self.assertEqual(doctype, doctype_fragment)
        self.assertEqual(str(soup)[:len(doctype_str)], doctype_str)

        # Make sure that the doctype was correctly associated with the
        # parse tree and that the rest of the document parsed.
        self.assertEqual(soup.p.contents[0], 'foo')

def assertDoctypeHandled(self, doctype_fragment):
        """Assert that a given doctype string is handled correctly."""
        doctype_str, soup = self._document_with_doctype(doctype_fragment)

        # Make sure a Doctype object was created.
        doctype = soup.contents[0]
        self.assertEqual(doctype.__class__, Doctype)
        self.assertEqual(doctype, doctype_fragment)
        self.assertEqual(str(soup)[:len(doctype_str)], doctype_str)

        # Make sure that the doctype was correctly associated with the
        # parse tree and that the rest of the document parsed.
        self.assertEqual(soup.p.contents[0], 'foo')

def doctype(self, name, pubid, system):
        self.soup.endData()
        doctype = Doctype.for_name_and_ids(name, pubid, system)
        self.soup.object_was_parsed(doctype)

def handle_decl(self, data):
        self.soup.endData()
        if data.startswith("DOCTYPE "):
            data = data[len("DOCTYPE "):]
        self.soup.handle_data(data)
        self.soup.endData(Doctype)

def doctype(self, name, pubid, system):
        self.soup.endData()
        doctype = Doctype.for_name_and_ids(name, pubid, system)
        self.soup.object_was_parsed(doctype)

def insertDoctype(self, token):
        name = token["name"]
        publicId = token["publicId"]
        systemId = token["systemId"]

        doctype = Doctype.for_name_and_ids(name, publicId, systemId)
        self.soup.object_was_parsed(doctype)

def doctype(self, name, pubid, system):
        self.soup.endData()
        doctype = Doctype.for_name_and_ids(name, pubid, system)
        self.soup.object_was_parsed(doctype)

def doctype(self, name, pubid, system):
        self.soup.endData()
        doctype = Doctype.for_name_and_ids(name, pubid, system)
        self.soup.object_was_parsed(doctype)