您需要安装pip3.

在Linux上，命令为:sudo apt install python3-pip

在Mac上，使用brew，首先是brew install python3
然后brew postinstall python3

On Linux, the command would be: sudo apt install python3-pip

On Mac, using brew, first brew install python3
Then brew postinstall python3

尝试致电pip3 -V看看是否有效.

Try calling pip3 -V to see if it worked.