pip3 -V
Traceback (most recent call last):
File "/usr/local/bin/pip3", line , in <module>
from pip._internal import main
ModuleNotFoundError: No module named 'pip._internal'

于是我们换个方式重新安装pip3

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3 get-pip.py --force-reinstall

在验证一下

pip3 -V
pip 10.0. from /usr/local/lib/python3./dist-packages/pip (python 3.6)
05-13 13:39