Error with pointing to correct python version: virtualenvwrapper.sh

Question

I get this error when I boot up terminal:

Last login: Thu Apr  9 19:49:08 on ttys001
/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Conte         


        

Answer 1

I had the same exact issue and updating my path didn't help anything, nor did setting VIRTUALENVWRAPPER_PYTHON and VIRTUALENVWRAPPER_VIRTUALENV. This is because I was seeing this strange behavior when running my version of python:

$ /usr/local/bin/python
Python 2.7.6 (v2.7.6:3a1db0d2747e, Nov 10 2013, 00:42:54)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> print sys.executable
/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python

I was able to fix everything by uninstalling python with brew, reinstalling python with brew, and forcing it to overwrite existing symlinks in /usr/local/bin.

brew uninstall --force python
brew install python
brew link --overwrite python
brew linkapps python
pip install --upgrade pip setuptools
sudo pip uninstall virtualenv
pip install virtualenv
sudo pip uninstall virtualenvwrapper
pip install virtualenvwrapper

Hopefully you were able to get past this issue when you encountered it six months ago. I wanted to post my solution in case others run in to the same issue and cannot solve it by setting their paths and env variables.

Answer 2

Today I got this error after a series of steps, the first was to install wormhole (https://magic-wormhole.readthedocs.io/en/latest/welcome.html#example) which installed Python 3.8. I started having other errors which I resolved doing a brew uninstall python@2

brew uninstall python@2
Uninstalling /usr/local/Cellar/python@2/2.7.15_2... (4,814 files, 84.8MB)
python@2 HEAD_3 is still installed.
Run `brew uninstall --force python@2` to remove all versions.

brew uninstall --force python@2
Uninstalling python@2... (822B)

At this point the error in this question appeared:

Last login: Wed May 27 11:33:08 on ttys025
/System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python: No module named virtualenvwrapper
virtualenvwrapper.sh: There was a problem running the initialization hooks.

If Python could not import the module virtualenvwrapper.hook_loader,
check that virtualenvwrapper has been installed for
VIRTUALENVWRAPPER_PYTHON=/usr/bin/python and that PATH is
set properly.

My solution was to :

ls -l /usr/local/bin/python3
lrwxr-xr-x  1 neo  admin  34 Nov 27 16:46 /usr/local/bin/python3 -> ../Cellar/python/3.7.5/bin/python3


ln -s ../Cellar/python/3.7.5/bin/python3 /usr/local/bin/python

Now the error seems to be gone. I am not sure if this is a good solution, I am interested in the feedback of those people who understand/know brew better than me.

Answer 3

The following was found in the virtualenvwrapper install guide. You could try this to set up your $PATH correct.

To override the $PATH search, set the variable VIRTUALENVWRAPPER_PYTHON to the full path of the interpreter to use and VIRTUALENVWRAPPER_VIRTUALENV to the full path of the virtualenv binary to use. Both variables must be set before sourcing virtualenvwrapper.sh. For example:

export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python
export VIRTUALENVWRAPPER_VIRTUALENV=/usr/local/bin/virtualenv
source /usr/local/bin/virtualenvwrapper.sh