UserWarning: There are no operators in the program to be executed. If you pass Program manually, ple

一、分析问题
问题：
UserWarning: There are no operators in the program to be executed. If you pass Program manually, please use fluid.program_guard to ensure the current Program is being used.
warnings.warn(error_info)

翻译：
用户警告：程序中没有要执行的运算符。如果您手动通过程序，请使用fluid.Program/u guard确保正在使用当前程序。

警告。警告（错误信息）

原因：内存/显存不够
参考链接：https://blog.csdn.net/qq_38507234/article/details/105888612

UserWarning: There are no operators in the program to be executed. If you pass Program manually, ple最先出现在Python成神之路。