how to install django 2.2 if i already have one code example

Example 1: install django

pip install django # Install Django Packages
django-admin startproject project_name # Create a Project
cd project_name
python manage.py makemigrations # Create new migrations
python manage.py migrate # Apply Migrations
python manage.py createsuperuser # Create User for admin
python manage.py runserver # Start Server

python manage.py startapp sub_module # Create a sub app

Example 2: pip install django

$ python -m pip install Django