List the python related locations:
python -c "import sys; print(sys.path)"
Create a virtual environment for each project:
pip install virtualenv
cd <proj_location>
python -m venv <proj_name+env>
Running a flask app:
set FLASK_APP=somescript.py
python -m flask run
Upgrade python modules
pip freeze > requirements.txt
Replace == with >= in the requirements.txt file
pip install -r requirements.txt --upgrade