Broken Python virtualenvwrapper

Question

I seem to have broken virtualenvwrapper while trying to upgrade Python 3 from 3.4.1 to the current version. Whenever I run "workon xxx", I get the following error:

usr/local/opt/python3/bin/python3.4: Error while finding spec for 'virtualenvwrapper.hook_loader' (<class 'ImportError'>: No module named 'virtualenvwrapper')

Background:

I have Python 2.7.6 and 3.4.1 installed on my Mac workstation (OSX 10.8.5). I also have virtualenvwrapper running with many different environments - some using 2.7 and other 3.4. Virtualenvwrapper was installed under 3.4.

I just attempted to upgrade Python 3.4.1 to the latest version by running "brew install python3". This installed 3.4.2, but failed to fully complete, saying it was unable to create a few necessary symlinks, and to run "brew link --overwrite python3", which I did.

Any guidance is greatly appreciated. Thanks.

Answer 1

I think I fixed it, but it would be great to get some feedback / confirmation.

From the error message, I am guessing that the Python3 virtualenvwrapper module had gotten blown away (or symlinked away). I found that pip can be forced to run from to run from a particular Python version using the syntax: pipV.V <command>. That is, to run pip against Python 3.4: $ pip3.4 freeze, for example.

Pip complained about being out of date, so here's all the steps I took to seemingly repair the problem: $ sudo pip3.4 install --upgrade pip $ pip3.4 freeze (returned nothing, and pip no longer complained about being out of date) $ sudo pip3.4 install virtualenvwrapper

Now "workon xxx" no longer complains, and appears to be functioning properly...