updating pip code example

Example 1: how to upgrade pip

python -m pip install --upgrade pip

Example 2: pip upgrade

python -m pip install --upgrade pip

Example 3: upgrade pip

python -m pip install --upgrade pip
python3 -m pip install --upgrade pip # on mac

Example 4: command to upgrade python version

python -m pip install pip
#or
python -m pip install –upgrade pip
python -m pip install --upgrade pip

Example 5: pip upgrade python

pip freeze | %{$_.split('==')[0]} | %{pip install --upgrade $_}