How to fix ModuleNotFoundError: No module named 'asttokens'

ModuleNotFoundError: No module named 'asttokens'
Recommended: Install via pip into your active environment.
python -m pip install asttokens

Verification

Command
python -c "import asttokens; print(asttokens.__version__)"
Expected output
Success! asttokens version x.y.z (e.g., 2.4.0)