JsonDatabase remembers loaded path

class JsonDatabase(dict):

    '''Json database'''

    @staticmethod

    def _get_path(path, default_filename, create=False):

    _path = None

    def _get_path(self, path, default_filename, create=False):

        '''Get a path and ensure its exists if create is True'''

        if path is None:

            if self._path is not None:

                path = self._path

            else:

                path = os.path.join(xdg_cache_home, "archversion", default_filename)

        if create and not os.path.exists(path):

            directory = os.path.split(path)[0]

        '''Load registered version database into this database'''

        assert(default_filename is not None)

        # find the right path

        path = self._get_path(path, default_filename)

        if path is not None and os.path.isfile(path):

            logging.debug("Loading database %s" % path)

        self._path = self._get_path(path, default_filename)

        if self._path is not None and os.path.isfile(self._path):

            logging.debug("Loading database %s" % self._path)

            try:

                fileobj = open(path, "r")

                fileobj = open(self._path, "r")

                dico = json.load(fileobj)

                self.update(dico)

            except Exception as exp:

                logging.error("Unable to load database %s: %s" % (path, exp))

                logging.error("Unable to load database %s: %s" % (self._path, exp))

    def save(self, path, default_filename, save_empty=False):

    def save(self, save_empty=False):

        '''Save current version database into a file'''

        assert(default_filename is not None)

        if not save_empty and len(self) == 0:

            logging.debug("Not saved. Database is empty")

            return

        # find the right path

        path = self._get_path(path, default_filename, create=True)

        if path is not None:

            logging.debug("Saving database %s" % path)

        if self._path is not None:

            logging.debug("Saving database %s" % self._path)

            try:

                fileobj = open(path, "w")

                fileobj = open(self._path, "w")

                json.dump(self, fileobj)

            except Exception as exp:

                logging.error("Unable to save database %s: %s" % (path, exp))

                logging.error("Unable to save database %s: %s" % (self._path, exp))