You are using pip version 21.3.1, however version 22.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

[root@iZ0jl3p5inpmj4c7dh31kqZ ~]# pip -V
pip 8.1.2 from /usr/lib/python2.7/site-packages (python 2.7)
[root@iZ0jl3p5inpmj4c7dh31kqZ ~]# pip3 -V
pip 21.3.1 from /usr/local/lib/python3.6/site-packages/pip (python 3.6)

 pip3 install docker-compose

解決方法：
1.pip直接更新
pip install --upgrade pip
pip3 install --user --upgrade pip
2.直接使用後面的提示命令
也就是you should consider upgrading via the 後面的命令
3.使用命令

python3 -m pip install pip==版本號
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原文連結：https://blog.csdn.net/qq_40984307/article/details/106137603