Python + Django: Trouble with setting up mkvirtualenv on macOS

Question

I'm using macOS (10.13.3) and have installed Python v 3.6.4

I'm trying to follow the instructions per this Mozilla article: https://developer.mozilla.org/en-US/docs/Learn/Server-side/Django/development_environment

My process:

1 which python » /usr/local/bin/python note, somewhere along the way I did a Symlink ln -s /usr/local/bin/python3 /usr/local/bin/python

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2 python3 -V » Python 3.6.4

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3 sudo -H pip3 install virtualenvwrapper »

Requirement already satisfied: virtualenvwrapper in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages
Requirement already satisfied: stevedore in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from virtualenvwrapper)
Requirement already satisfied: virtualenv in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from virtualenvwrapper)
Requirement already satisfied: virtualenv-clone in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from virtualenvwrapper)
Requirement already satisfied: pbr!=2.1.0,>=2.0.0 in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from stevedore->virtualenvwrapper)
Requirement already satisfied: six>=1.10.0 in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from stevedore->virtualenvwrapper)

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4 nano .bash_profile » Add following: »

PATH="/Library/Frameworks/Python.framework/Versions/3.6/bin:${PATH}"
export PATH

export WORKON_HOME=$HOME/.virtualenvs
# export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3 # No impact
# export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python3 # No impact
export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python # No impact
# VIRTUALENVWRAPPER_PYTHON=`which python` # No impact
export PROJECT_HOME=$HOME/Devel
source /usr/local/bin/virtualenvwrapper.sh

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5 source ~/.bash_profile

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6 mkvirtualenv my_django_environment »

Running virtualenv with interpreter /usr/local/bin/python
Using base prefix '/usr/local/bin/../../../Library/Frameworks/Python.framework/Versions/3.6'
New python executable in /Users/myuser/.virtualenvs/my_django_environment/bin/python
ERROR: The executable /Users/myuser/.virtualenvs/my_django_environment/bin/python is not functioning
ERROR: It thinks sys.prefix is '/Library/Frameworks/Python.framework/Versions/3.6' (should be '/Users/myuser/.virtualenvs/my_django_environment')
ERROR: virtualenv is not compatible with this system or executable

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7 Facepalm

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Complete contents of my .bash_profile file:

# Setting PATH for Python 3.6
# The original version is saved in .bash_profile.pysave

PATH="/Library/Frameworks/Python.framework/Versions/3.6/bin:${PATH}"
export PATH

export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python3
export PROJECT_HOME=$HOME/Devel
source /usr/local/bin/virtualenvwrapper.sh

I'm guessing my issue has to do with the following, but I have no idea what that means nor how to fix it, could someone please help me out?

ERROR: The executable /Users/myuser/.virtualenvs/my_django_environment/bin/python is not functioning
ERROR: It thinks sys.prefix is '/Library/Frameworks/Python.framework/Versions/3.6' (should be '/Users/myuser/.virtualenvs/my_django_environment')
ERROR: virtualenv is not compatible with this system or executable

Thanks in advance!

Answer 1

我不完全确定，但我认为运行以下解决了我的问题：

pip3 install --upgrade virtualenv

Answer 2

Good that you managed to solve the issue.

Having used mkvirtualenv for a while though, I recommend that you try Pipenv if you haven't already.

Pipenv records the python version that you are using in your virtualenv whereas virtualenvwrapper (via pip freeze ) doesn't.