After upgrading pip (or pip3, in this case) if the following occurs:python
$ ~ pip3 -V Traceback (most recent call last): File "/usr/local/bin/pip", line 7, in <module> from pip._internal import main ModuleNotFoundError: No module named 'pip._internal'
Force a reinstall of pip:bootstrap
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py python3 get-pip.py --force-reinstall
Verify install:curl
$ ~ pip3 -V pip 10.0.1 from /usr/local/lib/python3.6/site-packages/pip (python 3.6)