[bugfix] fix an import error in bert_tokenizer.py
@@ -10,7 +10,7 @@ import os
import collections
import unicodedata
from ...core import logger
-from fastNLP.io.file_utils import _get_file_name_base_on_postfix
+from ...io.file_utils import _get_file_name_base_on_postfix
from ...io.file_utils import _get_bert_dir
VOCAB_NAME = 'vocab.txt'
