def METHOD_NAME(self):
    all_handlers = list()
    for filename in glob.glob("%s/*.py" % os.path.dirname(__file__)):
        importlib.import_module(".%s" % os.path.splitext(os.path.basename(filename))[0], __name__)
    for module_name in dir(sys.modules[__name__]):
        for attribute_name in dir(getattr(sys.modules[__name__], module_name)):
            cls = getattr(getattr(sys.modules[__name__], module_name), attribute_name)
            if isinstance(cls, type) and issubclass(cls, LogFormat)\
                    and cls not in (LogFormat, BaseLogFormat, NewBaseLogFormat):
                all_handlers.append(cls(self._filename))
    self._handlers = sorted(all_handlers, key=lambda k: k.prio)