$ rm -rf /tmp/nonexisting.XYZ # just to be extra clear
$ orig_path=/tmp/nonexisting.XYZ/foo # on MacOS, where /tmp is at /private/tmp
$ greadlink -m "$orig_path" # demonstrate GNU readlink output for comparison...
/private/tmp/nonexisting.XYZ/foo
$ python -c 'import os.path, sys; print(os.path.realpath(sys.argv[1]))' "$orig_path"
/private/tmp/nonexisting.XYZ/foo
^{} 这样做
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