update pip package 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: pip upgrade package

pip install Django --upgrade

Example 5: how to update pip

#for updating pip type the following command in terminal or cmd or powershell
python -m pip install --upgrade pip

Example 6: python update installed packages

py2
$ pip install pip-review

$ pip-review --local --interactive

py3
$ pip3 install pip-review

$ py -3 -m pip_review --local --interactive