How can I use Homebrew to install both Python 2 and 3 on Mac?
I need to be able to switch back and forth between Python 2 and 3. How do I do that using Homebrew as I don't want to mess with path and get into trouble. Right now I have 2.7 installed through Homebrew.
I would use pyenv You can install it:
$ brew install pyenv
To enable pyenv in your Bash shell, you need to run:
$ eval "$(pyenv init -)"
To do this automatically for Bash upon startup, add that line to your
Once you have installed pyenv and activated it, you can install different versions of python and choose which one you can use. Example:
$ pyenv install 2.7.5
You can check the versions you have installed with:
$ pyenv versions
And you can switch between python versions with the command:
$ pyenv global 3.3.1
Also you can set a python version for the current directory with:
$ pyenv local 3.5.2
You can check by running
$ python --version Python 3.5.2
1 Homebrew used to instruct you to do this upon installation of pyenv, but the message was removed. For Zsh and other shells, the precise steps may be different.