1、重新安裝alipay-sdk-python，卸載pip uninstall alipay-sdk-python 或者在site-packages目錄刪除相關包文件;
安裝到最新版本pip install alipay-sdk-python==3.3.398，如果還有錯誤，參照2進行；
2、git clone https://github.com/alipay/alipay-sdk-python-all
python setup.py build
python setup.py install