The recommended Python version to run oletools is the latest Python 3.x (3.9 for now). Python 2.7 is still supported for the moment, even if it reached end of life in 2020 (for projects still using Python 2/PyPy 2 such as ViperMonkey). It is highly recommended to switch to Python 3 if possible.
You can find it on this GitHub project.
See the all tools : mraptor, msodde, olebrowse, oledir, oleid, olemap, olemeta, oleobj, oletimes, olevba, pyxswf, rtfobj.