pip报错：You are using pip version 21.1.3； however, version 21.2.1 is available.

使用pip安装第三方模块的时候提示

WARNING: You are using pip version 21.1.3; however, version 21.2.1 is available.
You should consider upgrading via the '/usr/bin/python3 -m pip install --upgrade pip' command.

解决方法：

下面自己也写了

python3 -m pip install --user --upgrade pip

大功告成！