cryptography is required for sha256_password or caching_sha2_password
需要cryptography模块的支持才能连接需要sha256_password or caching_sha2_password的数据库
pip install cryptography
sqlalchemy 连接mysql报 RuntimeError: cryptograpy si requeired for sha256_password 错误
原文：https://www.cnblogs.com/worldinmyeyes/p/12371423.html