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Your script only runs because a file path is typed straight into the source code, and nobody else on the team can point it anywhere else.
What you'll have at the end
A script that accepts --input and --output paths as arguments, with --help explaining each one
You need
A script that already does real, working file-to-file processing, but only against one file, because the paths it reads from and writes to are typed directly into the source.
Not covered
Turning the tool into an installable command with subcommands or a packaged executable: this recipe only frees the two paths that are currently baked in.
Leans on
Pin your Python project's dependencies so a teammate can rebuild it
once the tool depends on Click or Typer instead of only argparse, a teammate also needs your exact dependency versions pinned alongside the two options this recipe adds.
Split a long script into small testable functions
once the script does more than one real job, the function this recipe already separated from the command-line parsing is the natural seam to split further and test on its own.
Checked 25 Aug 2026
Part of the Python cookbook