[備忘録]Python3, pipのバージョン確認/更新

[基礎知識]
・$ python3 -m [コマンド]：pythonのモジュールを実行する
・$ python3 -m pip -V：pipのバージョンを確認する
・$ python3 -m pip install --upgrade pip：pipをバージョンアップする

[実行結果]

$ python3 -m pip -V
pip 20.0.2 from /Users/hoge/Library/Python/3.6/lib/python/site-packages/pip (python 3.6)
$ 
$ python3 -m pip install --upgrade pip
Collecting pip
 Downloading pip-21.3.1-py3-none-any.whl (1.7 MB)
    |████████████████████████████████| 1.7 MB 4.6 MB/s 
Installing collected packages: pip
 Attempting uninstall: pip
   Found existing installation: pip 20.0.2
   Uninstalling pip-20.0.2:
     Successfully uninstalled pip-20.0.2
Successfully installed pip-21.3.1
$ 
$ python3 -m pip -V
pip 21.3.1 from /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip (python 3.6)
$