How to use the pyulog.core.ULog._disable_str_exceptions function in pyulog

def parse_string(cstr):
        """
        wrapper for _parse_string with
        parametrized exception handling
        """
        ret = ''
        if _RUNNING_PYTHON3 and ULog._disable_str_exceptions:
            ret = _parse_string(cstr, 'ignore')
        else:
            ret = _parse_string(cstr)
        return ret

self._logged_messages = []
        self._logged_messages_tagged = {}
        self._dropouts = []
        self._data_list = []

        self._subscriptions = {} # dict of key=msg_id, value=_MessageAddLogged
        self._filtered_message_ids = set() # _MessageAddLogged id's that are filtered
        self._missing_message_ids = set() # _MessageAddLogged id's that could not be found
        self._file_version = 0
        self._compat_flags = [0] * 8
        self._incompat_flags = [0] * 8
        self._appended_offsets = [] # file offsets for appended data
        self._has_sync = True # set to false when first file search for sync fails
        self._sync_seq_cnt = 0 # number of sync packets found in file

        ULog._disable_str_exceptions = disable_str_exceptions

        self._load_file(log_file, message_name_filter_list)