Path.exists() and Path.resolve() do not work consistently with each other if the current working directory is deleted after Python is launched. For example, if I open a Python 3.13.0 interpreter ...

os.path.join (folder, filename) ensures the path is correct for the system. On Windows, it uses backslashes (reports\summary.txt); on Linux and macOS it uses forward slashes (reports/summary.txt).

I've had a problem for years where every time I install a new version of Python into a new directory using the .exe installer from python.org, the installer deletes all the main Python files, such as ...

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