Just a short comment, also to #2 : The canonically "correct" way of doing this would be to make the project installable with Python and specify entry an point (a function name) for the driver script in pyproject.toml. Then Python create the wrapper script on its own and would take care about the right path (when installing the package).

As for python3: It will probably fail, if somebody uses the toolchain on Windows with Python provided by Conda, as there you still have to use python (for python3)...