pip: no module named _internal

I have a problem when I try to use pip in any way. I'm using Ubuntu 16.04.4

I should say that I've used it already, and I never had any problem, but starting today when I use any command I always get the same error (as an example using pip --upgrade).

Traceback (most recent call last):
  File "/usr/local/bin/pip", line 7, in <module>
    from pip._internal import main
ImportError: No module named _internal

I have tried doing sudo apt-get remove python-pip followed by sudo apt-get install python-pip but nothing changed.

Solution 1:

This did it for me:

python -m pip install --upgrade pip

Environment: OSX && Python installed via brew

Solution 2:

An answer from askUbuntu works.

For pip2.7, you can at first curl https://bootstrap.pypa.io/pip/2.7/get-pip.py -o get-pip.py, then python2.7 get-pip.py --force-reinstall to reinstall pip.

Problem solved. Also works for python3.

Solution 3:

This solution works for me:

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

or use sudo for elevated permissions (sudo python3 get-pip.py --force-reinstall).

Of course, you can also use python instead of python3 ;)

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