How to use the buku.BukuDb.initdb function in buku

def test_initdb(self):
        if exists(TEST_TEMP_DBFILE_PATH):
            os.remove(TEST_TEMP_DBFILE_PATH)
        self.assertIs(False, exists(TEST_TEMP_DBFILE_PATH))
        conn, curr = BukuDb.initdb()
        self.assertIsInstance(conn, sqlite3.Connection)
        self.assertIsInstance(curr, sqlite3.Cursor)
        self.assertIs(True, exists(TEST_TEMP_DBFILE_PATH))
        curr.close()
        conn.close()

def __init__(self, json=False, field_filter=0, chatty=False, dbfile=None, colorize=True):
        """Database initialization API

        Parameters
        ----------
        json : bool, optional
            True if results should be printed in json format else False
        field_filter : int, optional
            Indicates format for displaying bookmarks. Default is 0.
        chatty : bool, optional
            Sets the verbosity of the APIs. Default is False.
        colorize : bool, optional
            Indicates whether color should be used in output. Default is True.
        """

        self.conn, self.cur = BukuDb.initdb(dbfile)
        self.json = json
        self.field_filter = field_filter
        self.chatty = chatty
        self.colorize = colorize