pip' is not recognized as an internal or external command, code example

Example 1: 'pip' is not recognized as an internal or external command, operable program or batch file.

py -m pip install [packagename]

Example 2: pip is not a batch command but python is installed

python -m pip install [packagename]

Example 3: 'pip' is not recognized as an internal or external command, operable program or batch file.

$ python -m pip --version
pip X.Y.Z from .../site-packages/pip (python X.Y)