Pathlib absolute() vs. resolve()

Path.absolute() is undocumented and thus unsupported, so use at your own peril.

What version of Python are you on? It works for me on macOS Mojave on Python 3.8:

Python 3.8.0 (tags/v3.8.0:fa919fdf25, Nov  1 2019, 15:59:17) 
[Clang 10.0.1 (clang-1001.0.46.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pathlib
>>> import os
>>> os.getcwd()
'/private/tmp'
>>> pathlib.Path('file.txt').resolve()
PosixPath('/private/tmp/file.txt')