python3连接mysql报错RuntimeError: 'cryptography' package is required for sha256_password or caching_sha2_password auth methods

使用pymysql报错RuntimeError ‘cryptography‘ package is required for sha256_password or caching_sha2_passw

如果报错：

解决办法：
安装cryptography
pip3 install cryptography

如果安装失败出现：

更新一下pip3就行：
pip3 install --upgrade pip

再重新安装cryptography
pip3 install cryptography

完成。