diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -0,0 +1,16 @@
+# BERT模型项目
++ 环境准备
+  + Python 3.9
+  + Pytorch 1.12
+  + torchtext 0.13.0
+## 基于BERT的文本分类任务
++ 文本分类
+  + `python ./tasks/sentence_classification.py`
+
+## 基于BERT的文本蕴含任务
++ 文本蕴含 
+  + `python ./tasks/pair_sentence_classification.py`
+
+## 基于BERT的MLM、NSP预训练任务
++ 预训练
+  + `python ./tasks/pretraining.py`
\ No newline at end of file
diff --git a/doc/This post is all you need（下卷）——步步走进BERT v1.2.0.pdf b/doc/This post is all you need（下卷）——步步走进BERT v1.2.0.pdf
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diff --git a/utils/data_helpers.py b/utils/data_helpers.py
index 0b94c5b..a3efc96 100644
--- a/utils/data_helpers.py
+++ b/utils/data_helpers.py
@@ -1,4 +1,3 @@
-from ast import arg
 import os
 import time
 import logging