Problem with symlinked paths

[ut-adamc]

I've encountered an issue where I'm getting the "Filename ... does not start with any of these prefixes" error message. It appears to arise from the use of symlinks in both the prefix the Python was built with, and in many of the components of the PYTHONPATH variable. Looking at the code, it seems likely that use of os.path.realpath rather than os.path.abspath inside the change_prefix function would prevent this problem.

Are there reasons this is inadvisable?

[stale]

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