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Lark
Lark is a parsing toolkit for Python, built with a focus on ergonomics, performance and modularity.
lark, a parsing library where I am somewhat involved has a really nice solution to this: Rules starting with _ are inlined in a post processing step.
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booze-tools
Booze Tools will become the complete programming-language development workbench, all written in Python 3.9 (for now).
It's not my idea. It's present at least as far back as YACC, "Yet Another Compiler-Compiler", which inspired the name of BISON (another parser-generator named for ungulates). Here's mine, written in Python: https://github.com/kjosib/booze-tools It also has a few extra bits. Feel free to exploit its MIT license to the fullest. I should mention that the design of symbolic reduce-actions was intended to allow one to use the same grammar across multiple host languages. You could even write a driver that does simply build a parse-tree and then hand that off to a separate phase, but in my world I almost always want a bottom-up tree-transduction as first-pass de-sugaring.
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Sonar
Write Clean Python Code. Always.. Sonar helps you commit clean code every time. With over 225 unique rules to find Python bugs, code smells & vulnerabilities, Sonar finds the issues while you focus on the work.
