could not import django on runserver code example

Example 1: ImportError: Couldn

# Make sure you have virtualenv set up on the directory your working on.
# To set up virtualenv, first download it (If you haven't yet)
# Do it by typing in this on the terminal: 
  pip install virtualenv 

# Then activate the virtual environment by doing these steps on the terminal
python -m venv venv # Or
python3 -m venv venv

# Then do this to activate it:
cd myproject/venv/Scripts/activate

Example 2: ImportError: Couldn't import Django. Are you sure it's installed and available on your PYTHONPATH environment variable? Did you forget to activate a virtual environment?

export PYTHONPATH=/Library/Python/3.7/site-packages