Runnin pip from a python script that runs from jep using virtualenv

[Alejandro Kapit]

I'm using JEP from Java to run a python script which actually installs (on demand) some new dependencies using pip.main.

And I'm running the my java application's Jar file after activating my virtualenv so that it will use a specific python environment.

However, I'm having kind of a weird experience, when my script actually runs:

pip.main(['install', '--user', package])

in order to install a non-existent package, it says that the dependency is already satisfied when I actually uninstalled it before running the script.

Could it be that pip inside of the script is running python from outside of the virtualenv? I'm confused.

How can I test this better?

Thanks in advance!

[Nathan Jensen]

Jep would hopefully pick up the virtualenv since you activated it before Java, but you may be the first person to try that.  When you import pip, try printing out pip.__file__ and see if it's picking up the virtualenv pip or the other/default Python's pip.

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[Alejandro Kapit]

It's very stange, when trying to import a package it doesn't found it, so pip tries to install it , buen when trying to install it it says it's already satisfied...  some ideas?

Note: first line is the print of the pip.__file__ .

INFO:setup:/usr/local/opt/python3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip/__init__.py

INFO:setup:Packages are: ['googleads']

INFO:setup:Importing: googleads

INFO:setup:Not found, trying to install: googleads

Requirement already satisfied: googleads in /usr/local/lib/python3.6/site-packages

On Monday, May 14, 2018 at 6:58:10 PM UTC+3, Nathan Jensen wrote:

Jep would hopefully pick up the virtualenv since you activated it before Java, but you may be the first person to try that.  When you import pip, try printing out pip.__file__ and see if it's picking up the virtualenv pip or the other/default Python's pip.

On Mon, May 14, 2018 at 4:52 AM, Alejandro Kapit <aka...@gmail.com> wrote:

I'm using JEP from Java to run a python script which actually installs (on demand) some new dependencies using pip.main.

And I'm running the my java application's Jar file after activating my virtualenv so that it will use a specific python environment.

However, I'm having kind of a weird experience, when my script actually runs:

pip.main(['install', '--user', package])

in order to install a non-existent package, it says that the dependency is already satisfied when I actually uninstalled it before running the script.

Could it be that pip inside of the script is running python from outside of the virtualenv? I'm confused.

How can I test this better?

Thanks in advance!

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[Nathan Jensen]

INFO:setup:/usr/local/opt/python3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip/__init__.py

appears to NOT be using the pip that came with the virtualenv since I presume the printed out directory is not your virtualenv but instead the builtin Python 3.  That looks like a pip from the standard Python install.  So your idea of "Could it be that pip inside of the script is running python from outside of the virtualenv?" appears correct.

Did you install jep into the virtualenv?  Is that a possibility for your use case?  I think you're running jep from the builtin python but then trying to use a virtualenv for the installs of the new dependencies.  If you install jep into the virtualenv and then run it I think it would work.

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[Alejandro Kapit]

Oh, that's a good point, I think I've installed jep from outside the virtualenv, just by specifing the python version, I think. 

I'll try!