Refactor Dygraph Flags #40786
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Refactor Dygraph Flags #40786
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phlrain approved these changes Mar 25, 2022
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PR types
Function optimization
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Describe
为了动态图可以方便转正 这边重构了python端对于dygraph_mode和eager_mode的判断目的有两个1. 让eager在dygraph_mode下直接成为默认模式（依赖全局变量）不进行额外的二次判断 2. 修改test_eager_guard使其可以支持从eager->fluid,再从fluid->eager 这个修改较大 对于yaml迁移的同学来说 主要关注的是对于计算型api从
的调用形式变成了
具体flag的关系我在fluild/framework.py最开始做了注释解释。简单来说是将执行机制在python分成static和non_static通过_non_static_mode来判断，这里_non_static_mode等同于从前in_dygraph_mode的功能。而在_non_static_mode下区分是否是_in_legacy_dygraph如果是则运行老动态图，否则运行新动态图，而原来的in_dygraph_mode将作为进入新动态图执行模式的判断等同于之前in_eager_mode的功能呢，而之前的in_eager_mode将删除。