How to fix ModuleNotFoundError: No module named 'pymysql'

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

Verification

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