BUILD ERROR from pip._internal...ImportError: No module named _internal

[akshay]

upon ./update_nrp update all the following error

-------------------------
ExperimentControl
-------------------------
VIRTUALENV
PYTHONPATH is set: (/home/akshay/Documents/NRP/MUSIC/build_venv/lib/python2.7/site-packages:/home/akshay/Documents/NRP/retina/build/lib:/opt/ros/kinetic/lib/python2.7/dist-packages:/home/akshay/.local/lib/python2.7/site-packages:/home/akshay/.local/lib/x86_64-linux-gnu/python2.7/site-packages:/home/akshay/Documents/NRP/GazeboRosPackages/devel/lib/python2.7/dist-packages:/home/akshay/Documents/NRP/CLE/hbp_nrp_cle:/home/akshay/Documents/NRP/ExperimentControl/hbp_nrp_excontrol:/home/akshay/Documents/NRP/ExperimentControl/hbp_nrp_scxml:/home/akshay/Documents/NRP/ExDBackend/hbp_nrp_backend:/home/akshay/Documents/NRP/ExDBackend/hbp_nrp_cleserver:/home/akshay/Documents/NRP/ExDBackend/hbp_nrp_commons:/home/akshay/Documents/NRP/ExDBackend/hbp_nrp_watchdog:/home/akshay/Documents/NRP/ExDBackend/hbp-flask-restful-swagger-master:/home/akshay/Documents/NRP/VirtualCoach/hbp_nrp_virtual_coach:/home/akshay/Documents/NRP/BrainSimulation/hbp_nrp_music_xml:/home/akshay/Documents/NRP/BrainSimulation/hbp_nrp_music_interface:/home/akshay/Documents/NRP/BrainSimulation/hbp_nrp_distributed_nest) this may cause problems with the virtualenv
virtualenv  -p python2.7 --no-site-packages platform_venv
Running virtualenv with interpreter /usr/bin/python2.7
New python executable in /home/akshay/Documents/NRP/ExperimentControl/platform_venv/bin/python2.7
Also creating executable in /home/akshay/Documents/NRP/ExperimentControl/platform_venv/bin/python
Installing setuptools, pkg_resources, pip, wheel...done.
touch platform_venv/bin/activate
/home/akshay/Documents/NRP/ExperimentControl/platform_venv/bin/pip install  --upgrade pip==1.4.1
Traceback (most recent call last):
  File "/home/akshay/Documents/NRP/ExperimentControl/platform_venv/bin/pip", line 7, in <module>
    from pip._internal import main
ImportError: No module named _internal
user_makefile:110: recipe for target 'platform_venv/new-pip.txt' failed
make: *** [platform_venv/new-pip.txt] Error 1
ExperimentControl BUILD ERROR

Any Ideas?

Thanks

[georg.hinkel]

Same here, what version of pip are you using?

[akshay]

When I try to check the version of the pip in $NRP/ExperimentControl/platform_venv I get the same error.

Traceback (most recent call last):
  File "/home/akshay/Documents/NRP/ExperimentControl/platform_venv/bin/pip", line 7, in <module>
    from pip._internal import main
ImportError: No module named _internal

easy_install pip in this platform_venv fixed pip to version 9.0.3. The build all was able to establish the ExperimentControl platform_venv in the build, but it broke on the next subdirectory (BrainSimulation) with the same error. I will try to easy_install pip in all the subdirectory venvs and then see if the build all works.

I first have to use easy_install because pip is broken for the command pip install --upgrade pip==1.4.1

[alexk]

Did you fix it? I ran into the same problem during ./update_nrp build all

[jacques]

Hi,

I also had the same error - it's all due to pip versioning and the many copies of pip you have on your system.

Check the output of:

whereis pip

likely you have many pip executables spread around in your $PATH with different version.