pip: no module named _internal

Question

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

Answer 1

This command works for me.

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

Answer 2

This issue maybe due to common user do not have privilege to access packages py file.
1. root user can run 'pip list'
2. other common user cannot run 'pip list'

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

Check pip py file privilege.

[root@]# ll /usr/lib/python2.7/site-packages/pip/  
合計 24  
-rw-------  1 root root   24  6月  7 16:57 __init__.py  
-rw-------  1 root root  163  6月  7 16:57 __init__.pyc  
-rw-------  1 root root  629  6月  7 16:57 __main__.py  
-rw-------  1 root root  510  6月  7 16:57 __main__.pyc  
drwx------  8 root root 4096  6月  7 16:57 _internal  
drwx------ 18 root root 4096  6月  7 16:57 _vendor  

solution : root user login and run

chmod -R 755 /usr/lib/python2.7 

fix this issue.