7

I have installed python2 and python3 with Homebrew. I would like to use virtualenv but I am not sure if I need to install it for both python2/python3. I am also wondering if I use virtualenvwrapper can I just set the VIRTUALENVWRAPPER_PYTHON to be either python2 or python3 depending on my needs?

Any help is greatly appreciated.

Thanks, Greg

Improve this question

1 Answer 1

Reset to default
15

According to this SO question, you could use a single virtualenv for both version, just use the -p path/to/python/version or --python=path/to/version flag to specify which version to use for the creation of the virtual environment. Note that you can use the same flag with mkvirtualenv.

This post recommends to just use the system Python (2.7 in your case) to install virtualenv itself.

Improve this answer
Sign up to request clarification or add additional context in comments.

3 Comments

Do you mean that one can use the same virtualenv program? What I understand from the mentioned SO question, is that you need a separate virtual environment for the two Python versions.
You can have python2.x and python3.x in the same virtual environment. For example, with virtualenvwrapper, you can do mkvirtualenv test; mkvirtualenv test -p /usr/local/bin/python3; in that case, the env's python will point to the latest installed (python3.), but you'll still have links to both python2.x and python3.x.
This worked for me, although it was the other way around: python was left pointing to the first installed version, and I have to call python3 explicitly.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.