on bounty: https://bountify.co/change-python-script-to-be-non-interactive-and-accept-list-input #3
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PLY library is a very powerful tool for making parsers, allows very complex control languages.
If you join command line parameters and pass the resulting string to the parser, it will check for allowed command line format, and run all code elements in the required order.
Also, you can make control language syntax as you want by defining new lexemes via regexps, and syntax structures in BNF-like notation.