cx_Oracle.DatabaseError: DPI-104

参考： https://blog.csdn.net/qq_36227528/article/details/102758559

报如图所示错误，下载instant-client

https://www.oracle.com/database/technologies/instant-client/winx64-64-downloads.html

把oracle客户端的安装文件中以.dll结尾的文件复制到python的安装目录中