pyhton+AST 实现 rule engine 调研
preprocess
- warp_function 在 code 外层嵌套一个函数, 用于实现 code 中的 return
- un_warp_function 去掉 code 外层嵌套的函数
- add_field_declaration 将 field 变量提取到顶部
- remove_field_declaration 删除顶部 field 变量
engine
- isIncluded 函数
bug
- Python 不能有多余缩进
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