upgrade pip for python 3.8 code example

Example 1: python3.8 install pip

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3.8 get-pip.py

Example 2: how to install pip

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
#Once you do that, enter line 3 inside
python get-pip.py

Example 3: pip upgrade

python -m pip install --upgrade pip