兼容高版本python

README.md

@@ -78,6 +78,12 @@ docker exec -it bert_tensorflow /bin/bash
 
 ```
 pip install requirements.txt
+
+遇到AttributeError: module 'typing' has no attribute '_ClassVar'则是由于新版本的python更换属性名导致的
+修改python3.7/site-packages/dataclasses.py 550行
+return type(a_type) is typing._ClassVar
+改为
+return type(a_type) is typing.ClassVar
 ```
 
 ## 训练

requirements.txt

@@ -19,4 +19,4 @@ matplotlib
 opencv-python-headless
 pyyaml
 Pillow
-tf-models-official>=2.4.0
+tf-models-official==2.4.0